Income Taxes - Significant deferred tax assets and deferred tax liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets
Accrued expenses and other	$ 1,230	$ 1,080
Unrealized gain/loss on investments	1,296
Stock-based compensation	1,626	1,753
Deferred revenue	49,053	37,108
Goodwill	6,378	357
Operating lease liabilities	1,071	1,126
Loss and loss adjustment reserves	16,392	11,971
Net operating losses	100,920	87,802
Disallowed interest	5,676	5,098
Research and development capitalized costs	521
Valuation allowance	(117,568)	(88,613)
Total deferred tax assets	66,595	57,682
Deferred tax liabilities
Property and equipment	(87)	(50)
Intangibles	(3,614)	(10,660)
Operating lease right-of-use assets	(1,026)	(1,091)
Deferred policy acquisition costs	(1,907)	(857)
Reinsurance balance due	(59,794)	(44,197)
Internally developed software	(590)	(1,180)
Total deferred tax liabilities	(67,018)	(58,035)
Net deferred tax liabilities	$ (423)	$ (353)