Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016
Current assets
Cash and cash equivalents	$ 58,194	$ 60,638
Accounts receivable, net	24,308	23,128
Inventories	16,887	17,440
Marketable securities	705	684
Prepaid expenses and other current assets	1,998	2,992
Total current assets	102,092	104,882
Property and equipment, net	31,820	32,471
Patents, net	4,352	5,013
Other assets	70	40
Total assets	138,334	142,406
Current liabilities
Accounts payable	8,763	8,506
Accrued expenses	21,688	26,993
Total current liabilities	30,451	35,499
Long-term liabilities
Other liabilities	4,939	6,010
Total liabilities	35,390	41,509
Commitments and contingencies (see Note 6)	0	0
Common stock, $0.001 par value; authorized 100,000,000 common shares at September 30, 2016 and June 30, 2016; issued and outstanding 33,046,180 at September 30, 2016 and 32,792,497 at June 30, 2016, respectively	33	33
Additional paid in capital	432,119	428,235
Accumulated other comprehensive income	61	40
Accumulated deficit	(329,269)	(327,411)
Total stockholders’ equity	102,944	100,897
Total liabilities and stockholders’ equity	$ 138,334	$ 142,406

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.