Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock, Shares	Common Stock, Additional Paid-in Capital	Treasury Stock	Shareholder Notes Receivable	Retained Earnings (Deficit)
Shareholders' equity, at beginning of period (shares) at Mar. 31, 2013		20,162,397
Shareholders' equity, beginning of period at Mar. 31, 2013	$ 77,769		$ 128,104	$ (38,378)	$ (265)	$ (11,692)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock and warrants for services (shares)		33,641
Issuance of stock and warrants for services	129		129
Stock activity for acquisition (shares)		940,940
Stock activity for acquisition	2,382			2,382
Exercise of stock options and warrants for cash (shares)		446,059
Exercise of stock options and warrants for cash	1,152		1,152
Shares issued under Employee Stock Purchase Plan (shares)		2,373
Shares issued under Employee Stock Purchase Plan	6		(4)	10
Tax benefit from exercise of stock options	13		13
Collection of shareholder notes receivable	215				215
Stock-based compensation (shares)		23,084
Stock-based compensation	1,593		1,593
Treasury stock purchase (shares)		(20,168)
Treasury stock purchase	(48)			(48)
Net income (loss)	(6,199)					(6,199)
Shareholders' equity, at end of period (shares) at Mar. 31, 2014		21,588,326
Shareholders' equity, end of period at Mar. 31, 2014	77,012		130,987	(36,034)	(50)	(17,891)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock and warrants for services (shares)		27,931
Issuance of stock and warrants for services	131		131
Issuance of common stock for cash, net of issuance costs (shares)		5,462,500
Issuance of common stock for cash, net of issuance costs	17,465		17,465
Exercise of stock options and warrants for cash (shares)		178,387
Exercise of stock options and warrants for cash	$ 430		430
Shares issued under Employee Stock Purchase Plan (shares)	1,486	1,486
Shares issued under Employee Stock Purchase Plan	$ 11		4	7
Collection of shareholder notes receivable	46				46
Stock-based compensation (shares)		170,055
Stock-based compensation	1,499		1,499
Employee tax withholdings on stock-based compensation (shares)		(7,152)
Employee tax withholdings on stock-based compensation	(22)			(22)
Net income (loss)	$ (32,061)					(32,061)
Shareholders' equity, at end of period (shares) at Mar. 31, 2015	27,421,533	27,421,533
Shareholders' equity, end of period at Mar. 31, 2015	$ 64,511		150,516	(36,049)	(4)	(49,952)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock and warrants for services (shares)		35,290
Issuance of stock and warrants for services	66		66
Exercise of stock options and warrants for cash (shares)		46,410
Exercise of stock options and warrants for cash	$ 97		97
Shares issued under Employee Stock Purchase Plan (shares)	3,925	3,925
Shares issued under Employee Stock Purchase Plan	$ 7		(1)	8
Stock-based compensation (shares)		270,303
Stock-based compensation	1,462		1,462
Employee tax withholdings on stock-based compensation (shares)		(10,323)
Employee tax withholdings on stock-based compensation	(34)			(34)
Net income (loss)	$ (20,126)					(20,126)
Shareholders' equity, at end of period (shares) at Mar. 31, 2016	27,767,138	27,767,138
Shareholders' equity, end of period at Mar. 31, 2016	$ 45,983		$ 152,140	$ (36,075)	$ (4)	$ (70,078)