CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net loss	$ (3,285)	$ (7,012)	$ (10,166)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization expense	3,535	1,484	1,050
Amortization of deferred contract costs	6,489	4,623	3,134
Stock-based compensation expense	2,742	1,079	504
Non-cash interest expense	211	0	0
Other long-term liabilities	0	497	0
Deferred taxes	59	(90)	83
Change in fair value of share purchase option	0	0	903
Changes in operating assets and liabilities
Accounts receivable	(791)	738	(744)
Deferred contract costs	(9,362)	(6,637)	(4,768)
Prepaid expenses and other current assets	(2,784)	(70)	(1,470)
Accounts payable	1,527	1,825	1,596
Accrued expenses	11,613	2,501	4,107
Deferred revenue	13,807	6,914	7,646
Net cash provided by operating activities	23,761	5,852	1,875
Investing Activities
Purchases of property and equipment	(2,380)	(2,367)	(1,001)
Purchases of convertible debt securities	(500)	0	0
Capitalization of internal-use software development costs	(1,403)	(1,032)	(162)
Cash paid for acquisition of business, net of cash acquired	(350)	(2,685)	0
Net cash used in investing activities	(4,633)	(6,084)	(1,163)
Financing Activities
Proceeds from exercise of stock options	1,327	252	97
Net proceeds from completing public offerings	215,370	0	0
Proceeds from issuance of Series A-1 Preferred Stock upon exercise of share purchase option	0	0	5,000
Payment of capital leases	(1,373)	0
Payment of deferred offering costs	0	(1,924)	0
Net cash provided by (used in) financing activities	215,324	(1,672)	5,097
Effect of exchange rate changes on cash and cash equivalents	(230)	0	0
Increase (decrease) in cash, cash equivalents and restricted cash	234,222	(1,904)	5,809
Cash, cash equivalents and restricted cash, beginning of year	35,619	37,523	31,714
Cash, cash equivalents and restricted cash, end of year	269,841	35,619	37,523
Supplemental cash flow disclosures
Cash paid for interest	321	0	0
Cash paid for income taxes	248	583	323
Reclassification of share purchase option liability to stockholders’ deficit upon exercise	0	0	5,270
Deferred offering costs incurred and not paid	0	243	0
Credit facility costs incurred and not paid	0	303	0
Accrued purchase consideration	0	497	0
Acquisition of fixed assets under capital leases	$ 5,750	$ 0	$ 0