Consolidated Statements of Changes in Stockholders' Equity and Comprehensive Loss (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid In Capital	Warrants	Accumulated Deficit	Comprehensive Loss
Beginning Balance at Jun. 30, 2011	$ 21,635	$ 17	$ 174,157	$ 9,909	$ (162,448)	$ (11,125)
Beginning Balance, Shares at Jun. 30, 2011		16,987,068
Stock-based compensation related to restricted stock awards, net, Shares		564,068
Stock-based compensation related to restricted stock awards, net	4,755	1	4,754
Exercise of stock options and warrants, Shares		548,097
Exercise of stock options and warrants	4,485	0	5,261	(776)
Issuance/expiration of common stock warrants	497		16	481
Employee Stock Purchase Plan Activity, Shares		170,000
Employee Stock Purchase Plan Activity	2,118		2,118
Conversion of convertible debt, Shares		40,323
Conversion of convertible debt	600		600
Sale of common stock net of issuance costs, Shares		1,780,000
Sale of common stock net of issuance costs	14,889	2	14,887
Net loss and comprehensive loss	(16,790)				(16,790)	(16,790)
Ending Balance at Jun. 30, 2012	32,189	20	201,793	9,614	(179,238)	(16,790)
Ending Balance, Shares at Jun. 30, 2012		20,089,556
Stock-based compensation related to restricted stock awards, net, Shares		799,465
Stock-based compensation related to restricted stock awards, net	7,241	1	7,240
Exercise of stock options and warrants, Shares		681,889
Exercise of stock options and warrants	5,927	1	7,179	(1,253)
Employee Stock Purchase Plan Activity, Shares		180,000
Employee Stock Purchase Plan Activity	2,403		2,403
Conversion of convertible debt, Shares		331,115
Conversion of convertible debt	4,900		4,900
Sale of common stock net of issuance costs, Shares		2,300,000
Sale of common stock net of issuance costs	38,209	2	38,207
Net loss and comprehensive loss	(24,037)				(24,037)	(24,037)
Ending Balance at Jun. 30, 2013	66,832	24	261,722	8,361	(203,275)	(24,037)
Ending Balance, Shares at Jun. 30, 2013		24,382,025
Stock-based compensation related to restricted stock awards, net, Shares		695,968
Stock-based compensation related to restricted stock awards, net	10,084	1	10,083
Exercise of stock options and warrants, Shares		2,535,813
Exercise of stock options and warrants	16,262	3	24,528	(8,269)
Expiration of common stock warrants			92	(92)
Employee Stock Purchase Plan Activity, Shares		149,839
Employee Stock Purchase Plan Activity	4,546		4,546
Conversion of convertible debt, Shares		321,097
Conversion of convertible debt	5,252		5,252
Sale of common stock net of issuance costs, Shares		3,000,000
Sale of common stock net of issuance costs	84,369	3	84,366
Net loss and comprehensive loss	(35,290)				(35,290)	(35,290)
Ending Balance at Jun. 30, 2014	$ 152,055	$ 31	$ 390,589	$ 0	$ (238,565)	$ (35,290)
Ending Balance, Shares at Jun. 30, 2014		31,084,742