XML 45 R35.htm IDEA: XBRL DOCUMENT v3.25.3

Stock Options (Tables)

3 Months Ended

Sep. 30, 2025

2012 Employee Stock Option Plan

Stock Options

Schedule of plan activity

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

2025

​

2024

​

​

​

​

​

​

Weighted average

​

​

​

​

Weighted average

​

​

Options

exercise price

Options

exercise price

Outstanding, beginning of year

​

​

361,036

​

$

21.44

​

​

363,036

​

$

21.47

​

Granted

​

​

—

​

​

—

​

​

—

​

​

—

​

Forfeited/Lapsed

​

​

(6,000)

​

​

(22.50)

​

​

—

​

​

—

​

Exercised

​

​

(18,000)

$

(22.99)

​

(2,000)

$

(26.94)

​

Outstanding, end of period

​

​

337,036

​

$

21.33

​

361,036

​

$

21.44

​

Exercisable, end of period

​

​

267,136

​

$

20.90

​

198,060

​

$

20.97

​

Weighted average fair value at grant date of options granted

​

​

n/a

​

​

​

​

n/a

​

​

​

Total intrinsic value of options exercised

​

$

325,000

​

​

​

​

$

35,000

​

​

​

Total intrinsic value of options outstanding

​

$

7,286,000

​

​

​

​

$

6,869,000

​

​

​

Total intrinsic value of options exercisable

​

$

5,890,000

​

​

​

​

$

3,860,000

​

​

​

Schedule of options outstanding

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Options outstanding

​

Options exercisable

​

​

Weighted average

​

​

​

​

​

​

​

Number

​

remaining

​

Weighted average

​

Number

​

Weighted average

Range of exercise prices

​

outstanding

​

contractual life

​

exercise price

​

exercisable

​

exercise price

$10.02 ‑ $26.94

​

337,036

​

5.88

​

$

21.33

​

267,136

​

$

20.90

​

​

337,036

​

5.88

​

$

21.33

​

267,136

​

$

20.90

2012 Non-Employee Stock Option Plan

Stock Options

Schedule of plan activity

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

2025

​

2024

​

​

​

​

Weighted average

​

​

Weighted average

​

​

Options

​

exercise price

​

Options

​

exercise price

​

Outstanding, beginning of year

​

​

20,400

​

$

14.39

​

​

20,400

​

$

14.39

​

Forfeited/Lapsed

​

​

—

​

​

—

​

​

—

​

​

—

​

Exercised

​

​

—

​

​

—

​

—

​

​

—

​

Outstanding, end of period

​

​

20,400

​

$

14.39

​

20,400

​

$

14.39

​

Exercisable, end of period

​

​

18,480

​

$

13.50

​

16,560

​

$

12.41

​

Weighted average fair value at grant date of options granted

​

​

n/a

​

​

​

​

​

n/a

​

​

Total intrinsic value of options exercised

​

​

n/a

​

​

​

​

​

n/a

​

​

Total intrinsic value of options outstanding

​

$

583,000

​

​

​

​

$

532,000

​

​

Total intrinsic value of options exercisable

​

$

544,000

​

​

​

​

$

465,000

​

​

Schedule of options outstanding

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Options outstanding

​

Options exercisable

​

​

​

​

Weighted average

​

Weighted

​

​

​

Weighted

​

​

Number

​

remaining

​

average exercise

​

Number

​

average exercise

Range of exercise prices

​

outstanding

contractual life

​

price

exercisable

​

price

$4.35 - $22.93

​

20,400

​

4.40

​

$

14.39

​

18,480

​

$

13.50

​

​

20,400

​

4.40

​

$

14.39

​

18,480

​

$

13.50

2018 Non-Employee Stock Option Plan

Stock Options

Schedule of plan activity

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

2025

​

2024

​

​

​

​

Weighted average

​

​

Weighted average

​

​

Options

exercise price

​

Options

exercise price

​

Outstanding, beginning of year

​

​

64,900

​

$

14.02

​

​

68,900

​

$

14.54

​

Forfeited/Lapsed

​

​

—

​

—

​

(4,000)

$

(22.93)

​

Exercised

​

​

—

​

​

​

—

​

—

​

Outstanding, end of period

​

​

64,900

​

$

14.02

​

64,900

​

$

14.02

​

Exercisable, end of period

​

​

62,200

​

$

13.63

​

59,500

​

$

13.21

​

Weighted average fair value at grant date of options granted

​

​

n/a

​

​

​

​

​

n/a

​

​

​

​

Total intrinsic value of options exercised

​

​

n/a

​

​

​

​

​

n/a

​

​

​

​

Total intrinsic value of options outstanding

​

$

1,877,000

​

​

​

​

$

1,716,000

​

​

​

​

Total intrinsic value of options exercisable

​

$

1,823,000

​

​

​

​

$

1,621,000

​

​

​

​

Schedule of options outstanding

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Options outstanding

​

Options exercisable

​

​

Weighted average

Weighted

​

Weighted

​

​

Number

​

remaining

​

average exercise

​

Number

​

average exercise

Range of exercise prices

​

outstanding

​

contractual life

​

price

​

exercisable

​

price

$8.10 - $22.93

​

64,900

4.35

​

$

14.02

62,200

​

$

13.63

​

​

64,900

4.35

​

$

14.02

62,200

​

$

13.63

2020 Non-Employee Stock Option Plan

Stock Options

Schedule of plan activity

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

2025

​

2024

​

​

​

​

​

​

Weighted average

​

​

​

​

Weighted average

​

​

Options

exercise price

Options

exercise price

Outstanding, beginning of year

​

51,900

$

23.00

​

​

56,900

$

23.35

​

Granted

​

—

​

​

—

​

​

—

​

​

—

​

Forfeited/Lapsed

​

​

—

​

​

—

​

​

(2,000)

​

$

(26.94)

​

Exercised

​

—

​

​

—

​

​

(3,000)

​

$

(26.94)

​

Outstanding, end of period

​

51,900

​

$

23.00

​

​

51,900

​

$

23.00

​

Exercisable, end of period

​

42,520

​

$

22.28

​

​

34,140

​

$

21.42

​

Weighted average fair value at grant date of options granted

​

​

n/a

​

​

​

n/a

​

​

​

Total intrinsic value of options exercised

​

​

n/a

​

​

32,000

​

​

​

Total intrinsic value of options outstanding

​

$

1,035,000

​

​

$

906,000

​

​

​

Total intrinsic value of options exercisable

​

$

879,000

​

​

$

650,000

​

​

​

Schedule of options outstanding

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Options outstanding

​

Options exercisable

​

​

​

​

Weighted average

​

​

​

​

​

​

​

​

​

​

Number

​

remaining

​

Weighted average

​

Number

​

Weighted average

Range of exercise prices

outstanding

contractual life

exercise price

exercisable

exercise price

$11.40 - $30.71

51,900

6.29

​

$

23.00

42,520

​

$

22.28

​

51,900

6.29

​

$

23.00

42,520

​

$

22.28

2022 Employee Stock Option Plan

Stock Options

Schedule of plan activity

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

2025

​

2024

​

​

​

​

​

​

Weighted average

​

​

​

​

Weighted average

​

​

Options

exercise price

​

Options

exercise price

​

Outstanding, beginning of year

​

130,000

$

41.38

​

​

130,000

$

41.38

​

Granted

​

—

​

​

—

​

​

—

​

​

—

​

Forfeited/Lapsed

​

​

—

​

​

—

​

​

—

​

​

—

​

Outstanding, end of period

​

130,000

​

$

41.38

​

​

130,000

​

$

41.38

​

Exercisable, end of period

​

52,000

​

$

41.38

​

​

26,000

​

$

41.38

​

Weighted average fair value at grant date of options granted

​

​

n/a

​

​

​

n/a

​

​

​

Total intrinsic value of options exercised

​

n/a

​

​

n/a

​

​

​

Total intrinsic value of options outstanding

​

$

334,000

​

​

$

189,000

​

​

​

Total intrinsic value of options exercisable

​

$

133,000

​

​

$

38,000

​

​

​

Schedule of options outstanding

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Options outstanding

​

Options exercisable

​

​

​

​

Weighted average

​

​

​

​

​

​

​

​

​

​

Number

​

remaining

​

Weighted average

​

Number

​

Weighted average

Range of exercise prices

outstanding

contractual life

exercise price

exercisable

exercise price

$21.60 - $49.39

130,000

8.56

​

$

41.38

52,000

​

$

41.38

​

130,000

8.56

​

$

41.38

52,000

​

$

41.38

X

- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(v)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (l)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 35
-Paragraph 1D
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480483/718-10-35-1D

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 35
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480483/718-10-35-3

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(02)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(03)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(01)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(02)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(03)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_PlanNameAxis=nssc_Employee2012StockOptionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PlanNameAxis=nssc_Nonemployee2012StockOptionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PlanNameAxis=nssc_Nonemployee2018StockOptionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PlanNameAxis=nssc_Nonemployee2020StockOptionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PlanNameAxis=nssc_Employee2022StockOptionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: