Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 46,765	$ 21,221
Accounts receivable, net	8,793	5,834
Inventory, net	6,094	6,013
Prepaid expenses and other current assets	4,263	3,388
Total current assets	65,915	36,456
Goodwill	20,123	20,123
Intangible assets, net	13,709	14,873
Right-of-use lease assets	367	536
Property and equipment, net	140	215
Restricted cash	40	40
Total assets	100,294	72,243
Current liabilities:
Accounts payable	2,314	2,762
Accrued expenses	11,720	6,494
Accrued payroll and related expenses	1,801	2,878
Lease liabilities, current portion	160	204
Total current liabilities	15,995	12,338
Deferred royalty obligation, net	124,487	124,437
Accrued interest expense on deferred royalty obligation, less current portion	23,489	19,111
Lease liabilities, less current portion	208	332
Other noncurrent liabilities	4,523	4,112
Total liabilities	168,702	160,330
Commitments and contingencies (Note 6)
Shareholders’ deficit:
Common Stock, $0.0001 par value; 100,000,000 shares authorized, 27,518,191 and 27,402,648 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	3	3
Additional paid-in capital	988,544	984,756
Accumulated deficit	(1,060,861)	(1,076,752)
Total shareholders’ deficit	(68,408)	(88,087)
Total liabilities and shareholders’ deficit	100,294	72,243
Series C-1 Convertible Preferred Stock
Shareholders’ deficit:
Series C-12 Convertible Preferred Stock, $0.0001 par value; 11,000 shares authorized, 3,906 shares issued and outstanding at September 30, 2021 and December 31, 2020; and liquidation preference of $3,906 at September 30, 2021 and December 31, 2020	$ 3,906	$ 3,906