Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 74,592	$ 53,621
Investment in equity securities, at fair value	1,796	625
Accounts receivable, net of $0 allowance for doubtful accounts	4,078	1,293
Inventories	720	4,542
Prepaid expenses and other	1,794	1,420
Assets held-for-sale	298	3,221
Total current assets	83,278	64,722
Property and equipment, net	984	985
Intangible assets, net	13,015	13,674
Long-term investments	27,569	14,038
Right of use assets	9,015	8,708
Other assets	377	504
Total assets	134,238	102,631
Current liabilities:
Accounts payable	2,697	5,113
Accrued and other current liabilities	2,858	2,834
Total current liabilities	5,555	7,947
Deferred Income	2,270	0
Other liabilities	13,615	1,019
Total liabilities	21,440	8,966
Commitments and contingencies (Note 19)
Redeemable noncontrolling interest, at redemption value (Note 11)	21,271	20,670
Stockholders' equity:
Preferred stock, $1.00 par value: 5,000,000 shares authorized and 0 shares issued and outstanding	0	0
Common stock, $0.01 par value: 250,000,000 shares authorized at September 30, 2020 and December 31, 2019 ; 124,023,374 shares and 97,851,243 shares issued at September 30, 2020 and December 31, 2019, respectively; 123,943,829 shares and 97,771,698 shares outstanding at September 30,2020 and December 31, 2019, respectively	1,240	979
Additional paid-in capital	656,639	606,686
Treasury stock, at cost: 79,545 shares held at September 30, 2020 and December 31, 2019	(8,034)	(8,034)
Accumulated other comprehensive loss	(1,507)	(2,728)
Accumulated deficit	(556,811)	(523,908)
Total stockholders' equity	91,527	72,995
Total liabilities, redeemable noncontrolling interest and stockholders' equity	$ 134,238	$ 102,631