Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 30,706	$ 46,600
Short-term investments	200,481	299,904
Accounts receivable, net of allowances of $4	5,014	7,492
Inventory	811	0
Prepaid expenses and other current assets	10,174	3,878
Total current assets	247,186	357,874
Property and equipment, net of accumulated depreciation and amortization of $58,337 and $59,875, respectively	18,588	19,390
Goodwill	44,543	44,543
Other intangible assets, net of accumulated amortization of $589 and $0, respectively	52,768	53,357
Other assets	428	461
Total assets	363,513	475,625
Current liabilities:
Accounts payable	43,857	52,877
Accrued liabilities	10,959	32,114
Current portion of deferred revenue	63,201	63,372
Current portion of long-term debt, net of deferred issuance costs	15,156	16,280
Total current liabilities	133,173	164,643
Deferred revenue, net of current portion	28,308	48,934
Long-term debt, net of deferred issuance costs	85,383	85,167
Deferred tax liabilities	10,023	18,675
Other long-term liabilities	313	805
Total liabilities	257,200	318,224
Commitments and contingencies
Equity:
Preferred stock, $.01 par value; 5,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $.001 par value; 225,000 shares authorized; 105,703 and 104,582 shares issued, respectively	105	105
Additional paid-in capital	1,430,630	1,411,222
Accumulated deficit	(1,322,304)	(1,250,363)
Accumulated other comprehensive loss	(214)	(195)
Treasury stock, at cost, 122 and 306 shares, respectively	(1,904)	(3,368)
Total equity	106,313	157,401
Total liabilities and equity	$ 363,513	$ 475,625