Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 127,011	$ 101,513
Restricted cash	2,631	2,635
Accounts receivable	6,803	4,352
Current contract assets	52,736	50,386
Prepaid expenses	932	1,873
Other current assets	980	2,018
Total current assets	191,093	162,777
Property and equipment, net	1,608	1,201
Operating lease right-of-use assets, net	5,600	5,733
Non-current contract assets	44,482	38,956
Deferred tax asset, net	83,888	85,218
Other non-current assets	124	124
Total assets	326,795	294,009
Current liabilities
Accounts payable	2,991	3,442
Accrued expenses	3,994	3,033
Income tax payable	4,791	1,640
Current portion of debt	3,125	4,888
Other current liabilities	4,109	4,005
Total current liabilities	19,010	17,008
Notes Payable, Noncurrent	170,212	152,859
Non-current operating lease liabilities	5,019	5,138
Other non-current liabilities	92,369	92,382
Total liabilities	286,610	267,387
Commitment and contingencies
Stockholders’ equity
Preferred stock, $0.01 par value; 10,000,000 shares authorized, none issued and outstanding	0	0
Common stock, $0.01 par value; 550,000,000 shares authorized, 128,198,185 shares issued and 126,803,096 shares outstanding as of March 31, 2021 and December 31, 2020, respectively	1,282	1,282
Additional paid-in capital	491,947	491,246
Accumulated deficit	(415,544)	(428,406)
Treasury stock at cost, 1,395,089 shares at March 31, 2021 and December 31, 2020, respectively	(37,500)	(37,500)
Total stockholders’ equity	40,185	26,622
Total liabilities and stockholders’ equity	$ 326,795	$ 294,009
Common stock, shares authorized (in shares)	550,000,000	550,000,000
Common stock, shares issued (in shares)	128,198,185	128,198,185