CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Allowance for doubtful accounts (in dollars)	$ 27	$ 13
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, liquidation preference (in dollars per share)	$ 4	$ 4
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	20,526,000	20,447,000
Common stock, shares outstanding	20,526,000	20,447,000
Convertible Preferred Stock
Preferred stock, shares issued	3,000	3,000
Preferred stock, shares outstanding	3,000	3,000