Annual report pursuant to Section 13 and 15(d)

Note 8 - Stock-based Compensation - Stock Options by Exercise Prices Range (Details)

v3.19.2
Note 8 - Stock-based Compensation - Stock Options by Exercise Prices Range (Details)
12 Months Ended
Mar. 31, 2019
$ / shares
shares
Number of Options Outstanding (in shares) | shares 457,500
Weighted- Avg. Remaining Contractual Life in Years (Year) 7 years 76 days
Weighted- Avg. Exercise Price of Options Outstanding (in dollars per share) $ 7.45
Number of Options Exercisable (in shares) | shares 292,500
Weighted- Avg. Exercise Price of Options Exercisable (in dollars per share) $ 8.03
Price Range 1 [Member]  
Exercise Price Range, Lower Range Limit (in dollars per share) 4
Exercise Price Range, Upper Range Limit (in dollars per share) $ 4.99
Number of Options Outstanding (in shares) | shares 5,000
Weighted- Avg. Remaining Contractual Life in Years (Year) 2 years 73 days
Weighted- Avg. Exercise Price of Options Outstanding (in dollars per share) $ 4.81
Number of Options Exercisable (in shares) | shares 5,000
Weighted- Avg. Exercise Price of Options Exercisable (in dollars per share) $ 4.81
Price Range 2 [Member]  
Exercise Price Range, Lower Range Limit (in dollars per share) 5
Exercise Price Range, Upper Range Limit (in dollars per share) $ 5.99
Number of Options Outstanding (in shares) | shares 140,000
Weighted- Avg. Remaining Contractual Life in Years (Year) 8 years 105 days
Weighted- Avg. Exercise Price of Options Outstanding (in dollars per share) $ 5.81
Number of Options Exercisable (in shares) | shares 25,000
Weighted- Avg. Exercise Price of Options Exercisable (in dollars per share) $ 5.45
Price Range 3 [Member]  
Exercise Price Range, Lower Range Limit (in dollars per share) 6
Exercise Price Range, Upper Range Limit (in dollars per share) $ 6.99
Number of Options Outstanding (in shares) | shares 30,000
Weighted- Avg. Remaining Contractual Life in Years (Year) 5 years 259 days
Weighted- Avg. Exercise Price of Options Outstanding (in dollars per share) $ 6.26
Number of Options Exercisable (in shares) | shares 25,000
Weighted- Avg. Exercise Price of Options Exercisable (in dollars per share) $ 6.21
Price Range 4 [Member]  
Exercise Price Range, Lower Range Limit (in dollars per share) 7
Exercise Price Range, Upper Range Limit (in dollars per share) $ 7.99
Number of Options Outstanding (in shares) | shares 142,500
Weighted- Avg. Remaining Contractual Life in Years (Year) 7 years 32 days
Weighted- Avg. Exercise Price of Options Outstanding (in dollars per share) $ 7.81
Number of Options Exercisable (in shares) | shares 97,500
Weighted- Avg. Exercise Price of Options Exercisable (in dollars per share) $ 7.83
Price Range 5 [Member]  
Exercise Price Range, Lower Range Limit (in dollars per share) 8
Exercise Price Range, Upper Range Limit (in dollars per share) $ 8.99
Number of Options Outstanding (in shares) | shares 60,000
Weighted- Avg. Remaining Contractual Life in Years (Year) 6 years 73 days
Weighted- Avg. Exercise Price of Options Outstanding (in dollars per share) $ 8.38
Number of Options Exercisable (in shares) | shares 60,000
Weighted- Avg. Exercise Price of Options Exercisable (in dollars per share) $ 8.38
Price Range 6 [Member]  
Exercise Price Range, Lower Range Limit (in dollars per share) 9
Exercise Price Range, Upper Range Limit (in dollars per share) $ 9.99
Number of Options Outstanding (in shares) | shares 80,000
Weighted- Avg. Remaining Contractual Life in Years (Year) 7 years 69 days
Weighted- Avg. Exercise Price of Options Outstanding (in dollars per share) $ 9.60
Number of Options Exercisable (in shares) | shares 80,000
Weighted- Avg. Exercise Price of Options Exercisable (in dollars per share) $ 9.60