Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Pledged as collateral for credit	$ 15	$ 15
Accounts receivable, net of allowance	$ 505	$ 573
Preferred stock, par value (in dollars per share)		$ 0.001
Preferred stock, shares authorized		5,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	69,146	52,571
Common stock, shares outstanding	68,560	51,986
Series B Convertible Preferred Stock [Member]
Preferred stock, shares issued	2
Preferred stock, shares outstanding	8
Series C Preferred Stock [Member]
Preferred stock, shares issued	1
Preferred stock, shares outstanding	1