Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 12,044	$ 32,545
Accounts receivable	4,208
Prepaid expenses and other current assets	1,611	1,493
Total current assets	17,863	34,038
Property and equipment, net	7	22
Intangible assets	71,600
Goodwill	11,100
Operating lease right-of-use assets	537	734
Other assets		70
Total assets	101,107	34,864
Current liabilities:
Accounts payable	5,200	565
Accrued expenses	9,911	4,088
Acquisition obligation, net	6,078
Operating lease liability	234	209
Total current liabilities	21,423	4,862
Warrant liability	2,819
Series X preferred stock liability (includes 5 shares of Series X convertible preferred stock, $0.01 par value per share issued and outstanding as December 31, 2022 - Note 8)	34,300
Operating lease liability, net of current portion	326	549
Deferred tax liability	3,283
Other liabilities	22
Total liabilities	62,173	5,411
Commitments and contingencies (Note 15)
Stockholders' equity:
Preferred stock, $0.01 par value, Authorized - 5,000,000 shares: Series A convertible preferred stock; Designated - 1,500,000 shares; Issued and outstanding - 241 shares
Common stock, $0.001 par value, Authorized - 140,000,000 shares; Issued and outstanding - 3,653,685 and 3,106,947 at December 31, 2022 and December 31, 2021, respectively	4	3
Additional paid-in capital	770,663	764,911
Accumulated deficit	(758,821)	(735,461)
Accumulated other comprehensive income (loss)	(21)
Total stockholders' equity	11,826	29,453
Total liabilities, convertible redeemable preferred stock, and stockholders' equity	101,107	34,864
Series A convertible preferred stock
Stockholders' equity:
Preferred stock, $0.01 par value, Authorized - 5,000,000 shares: Series A convertible preferred stock; Designated - 1,500,000 shares; Issued and outstanding - 241 shares
Series Z convertible preferred stock
Current liabilities:
Preferred stock, $0.01 par value, Authorized - 5,000,000 shares: Series Z convertible redeemable preferred stock (Note 9); Designated - 150,000 shares, Issued and outstanding - 77,900 shares at December 31, 2022	27,108
Series B1 convertible preferred stock
Stockholders' equity:
Preferred stock, $0.01 par value, Authorized - 5,000,000 shares: Series A convertible preferred stock; Designated - 1,500,000 shares; Issued and outstanding - 241 shares	$ 1