Note 8 - Accrued Expenses - Components of Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021
Wages, commissions, bonus and profit sharing	$ 521	$ 211
Vacation	399	408
Rent, interest and legal	184	86
Other accrued expenses	187	139
Total accrued expenses	$ 1,291	$ 844