Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 83,293	$ 46,600
Short-term investments	113,524	299,904
Accounts receivable, net of allowances of $4	10,597	7,492
Inventory	2,149	0
Prepaid expenses and other current assets	4,458	3,878
Total current assets	214,021	357,874
Property and equipment, net of accumulated depreciation and amortization of $58,794 and $59,875, respectively	18,167	19,390
Goodwill	44,543	44,543
Other intangible assets, net of accumulated amortization of $1,030 and $0, respectively	52,327	53,357
Other assets	429	461
Total assets	329,487	475,625
Current liabilities:
Accounts payable	52,628	52,877
Accrued liabilities	12,729	32,114
Current portion of deferred revenue	48,738	63,372
Current portion of long-term debt, net of deferred issuance costs	14,633	16,280
Total current liabilities	128,728	164,643
Deferred revenue, net of current portion	26,545	48,934
Long-term debt, net of deferred issuance costs	85,512	85,167
Deferred tax liabilities	10,023	18,675
Other long-term liabilities	303	805
Total liabilities	251,111	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; 105,710 and 104,582 shares issued, respectively	106	105
Additional paid-in capital	1,433,263	1,411,222
Accumulated deficit	(1,353,026)	(1,250,363)
Accumulated other comprehensive loss	(63)	(195)
Treasury stock, at cost, 122 and 306 shares, respectively	(1,904)	(3,368)
Total equity	78,376	157,401
Total liabilities and equity	$ 329,487	$ 475,625