v3.20.2
Note 10 - Stock-based Compensation (Details Textual) - USD ($)
|
9 Months Ended |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares) |
300,770
|
141,768
|
| Share-based Payment Arrangement, Expense |
$ 998,122
|
$ 1,073,940
|
| Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount |
|
$ 360,486
|
| Allocated Share-based Compensation Expense, Estimate Remainder of Fiscal Year |
339,652
|
|
| Allocated Share-based Compensation Expense, Estimate, Fiscal Year Two |
$ 20,834
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) |
$ 4.30
|
$ 9.01
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year) |
6 years 98 days
|
6 years 54 days
|
| The 2019 Plan [member] |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) |
800,000
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) |
10 years
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares) |
300,770
|
|
| The 2019 Plan [member] | One Year after Date of Grant [Member] | Minimum [Member] |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |
1 year
|
|
| The 2019 Plan [member] | One Year after Date of Grant [Member] | Maximum [Member] |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |
3 years
|
|
| ESPP [Member] |
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) |
200,000
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent |
90.00%
|
|
| Common Stock, Capital Shares Reserved for Future Issuance (in shares) |
84,693
|
|
| X |
- DefinitionEstimated expense to be recognized for the second fiscal year following the most recent fiscal year arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.
| Name: |
ntic_AllocatedShareBasedCompensationExpenseEstimateFiscalYearTwo |
| Namespace Prefix: |
ntic_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
debit |
| Period Type: |
duration |
|
| X |
- DefinitionEstimated expense to be recognized for the remainder of the fiscal year arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.
| Name: |
ntic_AllocatedShareBasedCompensationExpenseEstimateRemainderOfFiscalYear |
| Namespace Prefix: |
ntic_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
debit |
| Period Type: |
duration |
|
| X |
- DefinitionAmount of expense for award under share-based payment arrangement. Excludes amount capitalized.
| Name: |
us-gaap_AllocatedShareBasedCompensationExpense |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
debit |
| Period Type: |
duration |
|
| X |
- DefinitionAggregate number of common shares reserved for future issuance.
| Name: |
us-gaap_CommonStockCapitalSharesReservedForFutureIssuance |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:sharesItemType |
| Balance Type: |
na |
| Period Type: |
instant |
|
| X |
- DefinitionAmount of cost to be recognized for option under share-based payment arrangement.
| Name: |
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:monetaryItemType |
| Balance Type: |
debit |
| Period Type: |
instant |
|
| X |
- DefinitionPeriod over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.
| Name: |
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:durationItemType |
| Balance Type: |
na |
| Period Type: |
duration |
|
| X |
- DefinitionNumber of shares authorized for issuance under share-based payment arrangement.
| Name: |
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:sharesItemType |
| Balance Type: |
na |
| Period Type: |
instant |
|
| X |
- DefinitionGross number of share options (or share units) granted during the period.
| Name: |
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:sharesItemType |
| Balance Type: |
na |
| Period Type: |
duration |
|
| X |
- DefinitionThe weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.
| Name: |
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
num:perShareItemType |
| Balance Type: |
na |
| Period Type: |
duration |
|
| X |
- DefinitionPeriod from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
| Name: |
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:durationItemType |
| Balance Type: |
na |
| Period Type: |
duration |
|
| X |
- DefinitionWeighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
| Name: |
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
xbrli:durationItemType |
| Balance Type: |
na |
| Period Type: |
duration |
|
| X |
- DefinitionPurchase price of common stock expressed as a percentage of its fair value.
| Name: |
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent |
| Namespace Prefix: |
us-gaap_ |
| Data Type: |
num:percentItemType |
| Balance Type: |
na |
| Period Type: |
duration |
|
| X |
- Details
| Name: |
us-gaap_PlanNameAxis=ntic_The2019PlanMember |
| Namespace Prefix: |
|
| Data Type: |
na |
| Balance Type: |
|
| Period Type: |
|
|
| X |
- Details
| Name: |
us-gaap_VestingAxis=ntic_OneYearAfterDateOfGrantMember |
| Namespace Prefix: |
|
| Data Type: |
na |
| Balance Type: |
|
| Period Type: |
|
|
| X |
- Details
| Name: |
srt_RangeAxis=srt_MinimumMember |
| Namespace Prefix: |
|
| Data Type: |
na |
| Balance Type: |
|
| Period Type: |
|
|
| X |
- Details
| Name: |
srt_RangeAxis=srt_MaximumMember |
| Namespace Prefix: |
|
| Data Type: |
na |
| Balance Type: |
|
| Period Type: |
|
|
| X |
- Details
| Name: |
us-gaap_PlanNameAxis=ntic_ESPPMember |
| Namespace Prefix: |
|
| Data Type: |
na |
| Balance Type: |
|
| Period Type: |
|
|
|
