CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 31,126	$ 46,590
Restricted cash	19,615	20,183
Accounts receivable, net of allowances of $2,757 and $1,919, respectively ($4,045 and $2,698 of accounts receivable attributable to related parties, respectively)	69,379	71,853
Prepaid expenses and other current assets ($1,496 and $1,180 attributable to related parties, respectively)	16,910	15,357
Total current assets	137,030	153,983
Property and equipment, net	30,973	31,693
Operating right-of-use assets	28,959	36,689
Goodwill	418,327	416,418
Intangible assets, net	52,340	79,559
Deferred tax assets	2,741	2,374
Other non-current assets	7,600	2,979
Total assets	677,970	723,695
Current liabilities:
Accounts payable ($2,817 and $2,510 attributable to related parties, respectively)	36,640	44,804
Accrued expenses ($835 and $6,902 attributable to related parties, respectively)	48,380	55,507
Contract liabilities ($3,538 and $1,519 attributable to related parties, respectively)	58,529	58,158
Customer advances	12,477	9,886
Current portion of secured term note	12,644	0
Current operating lease liabilities	7,024	6,764
Warrants liability	2,831	7,725
Other current liabilities	5,750	7,393
Total current liabilities	184,275	190,237
Senior secured convertible notes (related party)	192,895	184,075
Financing derivatives (related party)	11,300	21,587
Non-current operating lease liabilities	36,127	42,497
Non-current contract liabilities	4,156	291
Deferred tax liabilities	627	287
Non-current portion of secured term note	0	12,463
Other non-current liabilities	19,600	13,284
Total liabilities	448,980	464,721
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.001 par value per share; 5,000,000 shares authorized at December 31, 2020 and 2019; no shares issued or outstanding as of December 31, 2020 or 2019	0	0
Common stock, $0.001 par value per share; 150,000,000 shares authorized as of December 31, 2020 and 2019; 79,703,342 shares issued and 72,938,546 shares outstanding as of December 31, 2020, and 76,829,926 shares issued and 70,065,130 shares outstanding as of December 31, 2019	73	70
Additional paid-in capital	1,621,986	1,609,358
Accumulated other comprehensive loss	(7,030)	(12,333)
Accumulated deficit	(1,156,055)	(1,108,137)
Treasury stock, at cost, and 6,764,796 shares as of December 31, 2020 and 2019	(229,984)	(229,984)
Total stockholders' equity	228,990	258,974
Total liabilities and stockholders' equity	$ 677,970	$ 723,695