CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2016	Mar. 31, 2016
Allowance for doubtful accounts (in dollars)	$ 10	$ 13
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000	5,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	40,000	40,000
Common stock, shares issued	20,527	20,447
Common stock, shares outstanding	20,527	20,447
Convertible Preferred Stock
Preferred stock, shares issued	3	3
Preferred stock, shares outstanding	3	3
Preferred stock, liquidation preference (in dollars per share)	$ 4	$ 4