Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012
Current assets
Cash and cash equivalents	$ 67,897	$ 35,529
Accounts receivable, net	14,730	13,644
Inventories	6,243	7,061
Prepaid expenses and other current assets	959	1,536
Total current assets	89,829	57,770
Property and equipment, net	2,999	2,163
Patents, net	3,219	2,635
Debt conversion option and other assets	850	556
Total assets	96,897	63,124
Current liabilities
Current maturities of long-term debt	5,095	4,678
Accounts payable	7,230	5,610
Deferred grant incentive	156	302
Accrued expenses	9,932	7,262
Total current liabilities	22,413	17,852
Long-term liabilities
Long-term debt, net of current maturities	7,472	12,842
Other liabilities	180	241
Total long-term liabilities	7,652	13,083
Total liabilities	30,065	30,935
Commitments and contingencies
Common stock, $0.001 par value at June 30, 2013 and 2012; authorized 100,000,000 common shares at June 30, 2013 and 2012; issued and outstanding 24,382,025 at June 30, 2013 and 20,089,556 at June 30, 2012	24	20
Additional paid in capital	261,722	201,793
Common stock warrants	8,361	9,614
Accumulated deficit	(203,275)	(179,238)
Total stockholders' equity	66,832	32,189
Total liabilities and stockholders' equity	$ 96,897	$ 63,124