Consolidated Balance Sheets-Unaudited - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 52,251	$ 36,112
Short-term investments	59,195	235,547
Accounts receivable, net	1,383	56,532
Inventory	0	4,243
Prepaid expenses and other current assets	9,109	5,320
Total current assets	121,938	337,754
Property and equipment, net of accumulated depreciation and amortization of $63,795 and $61,741, respectively	11,106	14,047
Goodwill	44,543	44,543
Intangible assets, net	0	19,716
Other assets	1,341	1,655
Total assets	178,928	417,715
Current liabilities:
Accounts payable	11,734	12,178
Accrued liabilities	58,497	42,151
Current portion of long-term debt, net of deferred issuance costs	8,691	11,012
Total current liabilities	78,922	65,341
Long-term debt, net of deferred issuance costs	11,629	234,171
Other long-term liabilities	738	1,102
Total liabilities	91,289	300,614
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; 117,231 and 106,679 shares issued, respectively	117	106
Additional paid-in capital	1,486,853	1,462,172
Accumulated deficit	(1,394,523)	(1,341,444)
Accumulated other comprehensive loss	35	84
Treasury stock, at cost, 793 and 407 shares, respectively	(4,843)	(3,817)
Total stockholder's equity (deficit)	87,639	117,101
Total liabilities and equity	$ 178,928	$ 417,715