CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 51,785	$ 47,185
Accounts receivable, net of allowance of $733 and $652 as of December 31, 2019 and 2018, respectively	22,126	23,436
Prepaid expenses and other current assets	10,452	9,248
Total current assets	84,363	79,869
Operating lease right of use assets	11,128
Property and equipment, net	9,597	12,007
Goodwill	23,486	23,486
Intangible assets, net	1,285	1,894
Deferred contract costs, net of current portion	12,810	11,336
Long-term deferred tax assets, net	3,584	4,162
Other assets	614	1,515
Total assets	146,867	134,269
Current liabilities:
Accounts payable	409	1,598
Accrued expenses	8,577	9,358
Deferred revenue	21,000	24,205
Other current liabilities	6,431	3,569
Total current liabilities	36,417	38,730
Long-term operating leases, net of current portion	9,767
Long-term finance leases, net of current portion	27	1,404
Lease incentive obligation	0	2,154
Other long-term liabilities	1,007	2,343
Total liabilities	47,218	44,631
Commitments and contingencies (Note 6)
Stockholders' equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized, no shares issued and outstanding as of December 31, 2019 and 2018, respectively	0	0
Common stock, $0.001 par value, 100,000,000 shares authorized, 28,077,469 and 27,347,115 shares issued and outstanding as of December 31, 2019 and 2018, respectively	28	27
Additional paid-in capital	278,111	271,550
Accumulated other comprehensive loss	(1,740)	(1,707)
Accumulated deficit	(176,750)	(180,232)
Total stockholders' equity	99,649	89,638
Total liabilities and stockholders' equity	$ 146,867	$ 134,269