CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	[1]
Current assets:
Cash and cash equivalents	$ 7,978	$ 11,134
Restricted cash	972	971
Accounts receivable, net	5,432	8,939
Prepaid expenses and other current assets	3,029	3,522
Total current assets	17,411	24,566
Property and equipment, net	5,969	8,524
Right-of-use assets, operating leases	9,336	7,705
Intangible assets, net	0	95
Other non-current assets	913	1,403
Total assets	33,629	42,293
Current liabilities:
Accounts payable	1,194	1,679
Accrued expenses and other current liabilities	7,118	9,010
Note payable, current	2,033	0
Operating lease liabilities	6,820	3,786
Total current liabilities	17,165	14,475
Note payable, net of current	1,287	0
Operating lease liabilities, non-current	3,483	5,181
Other long-term liabilities	884	1,577
Total liabilities	22,819	21,233
Commitments and contingencies (Note 13)
Stockholders’ equity:
Common stock, $0.001 par value - 142,857 shares authorized, 7,115 and 6,810 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively	7	7
Additional paid-in capital	300,490	299,263
Accumulated deficit	(288,636)	(277,112)
Accumulated other comprehensive loss	(1,051)	(1,098)
Total stockholders’ equity	10,810	21,060
Total liabilities and stockholders’ equity	$ 33,629	$ 42,293

[1] Derived from the Company’s audited consolidated financial statements as of December 31, 2019.