Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Current assets
Cash and cash equivalents	$ 126,592	$ 67,897
Accounts receivable, net	21,383	14,730
Inventories	12,890	6,243
Prepaid expenses and other current assets	1,846	959
Total current assets	162,711	89,829
Property and equipment, net	15,297	2,999
Patents, net	3,823	3,219
Debt conversion option and other assets	70	850
Total assets	181,901	96,897
Current liabilities
Current maturities of long-term debt	2,400	5,095
Accounts payable	12,699	7,230
Accrued expenses	14,630	10,088
Total current liabilities	29,729	22,413
Long-term liabilities
Long-term debt, net of current maturities	0	7,472
Other liabilities	117	180
Total long-term liabilities	117	7,652
Total liabilities	29,846	30,065
Commitments and contingencies
Common stock, $0.001 par value at June 30, 2014 and 2013; authorized 100,000,000 common shares at June 30, 2014 and 2013; issued and outstanding 31,084,742 at June 30, 2014 and 24,382,025 at June 30, 2013	31	24
Additional paid in capital	390,589	261,722
Common stock warrants	0	8,361
Accumulated deficit	(238,565)	(203,275)
Total stockholders’ equity	152,055	66,832
Total liabilities and stockholders’ equity	$ 181,901	$ 96,897