CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)	Class B Preferred Stock Previously Reported	Class B Preferred Stock	Previously Reported Common Stock	Previously Reported Additional Paid-in Capital	Previously Reported Retained Earnings	Previously Reported AOCI (Loss), Net	Previously Reported	Restatement Adjustment	Common Stock	Additional Paid-in Capital	Retained Earnings	AOCI (Loss), Net	Total
Balance at Dec. 31, 2018	$ 3,000	$ 3,000	$ 82,000	$ 213,490,000	$ 51,415,000	$ (473,000)	$ 264,517,000		$ 82,000	$ 213,490,000	$ 51,230,000	$ (405,000)	$ 264,400,000
Balance (in shares) at Dec. 31, 2018	272,636	272,636	8,217,274						8,217,274
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock grants, net of forfeiture (in shares)									104,862
Employee and non-employee stock-based compensation										3,067,000			3,067,000
Repurchase of shares for tax withholding for restricted stock vesting										(89,000)			(89,000)
Repurchase of shares for tax withholding for restricted stock vesting (in shares)									(9,218)
Net income											30,134,000		30,134,000
Other comprehensive income												1,612,000	1,612,000
Balance at Dec. 31, 2019	$ 3,000	$ 3,000	$ 82,000	$ 216,468,000	81,364,000	1,207,000	$ 299,124,000		$ 82,000	216,468,000	81,364,000	1,207,000	299,124,000
Balance (in shares) at Dec. 31, 2019	272,636	272,636	8,312,918						8,312,918
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adopting new accounting standard | ASU 2016-01					$ 68,000	$ (68,000)						68,000
Cumulative effect of adopting new accounting standard | ASU 2014-09											(117,000)		(117,000)
Cumulative effect of adopting new accounting standard | ASU 2014-09								$ 117,000
Cumulative effect of adopting new accounting standard													81,364,000
Restricted stock grants, net of forfeiture (in shares)									(3,298)
Employee and non-employee stock-based compensation										3,312,000			3,312,000
Repurchase of shares for tax withholding for restricted stock vesting										(881,000)			(881,000)
Repurchase of shares for tax withholding for restricted stock vesting (in shares)									(14,348)
Net income											39,466,000		39,466,000
Other comprehensive income												(234,000)	(234,000)
Balance at Dec. 31, 2020		$ 3,000							$ 82,000	$ 218,899,000	$ 120,830,000	$ 973,000	340,787,000
Balance (in shares) at Dec. 31, 2020		272,636							8,295,272
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adopting new accounting standard													$ 120,830,000