CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect Period Of Adoption Adjustment	Common stock	Series A Non-Voting Preferred stock	Retained earnings (Accumulated deficit)	Retained earnings (Accumulated deficit) Cumulative Effect Period Of Adoption Adjustment	Accumulated other comprehensive income (loss)
Beginning balance at Dec. 31, 2018	$ 141,374	$ (207)	$ 143,466	$ 8,480	$ (9,428)	$ (207)	$ (1,144)
Beginning balance (in shares) at Dec. 31, 2018			21,916,000	1,467,000
Increase (Decrease) in Stockholders' Equity
Issuance of restricted stock, net	0
Issuance of restricted stock, net (in shares)			102,000
Common stock based compensation expense	200		$ 200
Net income	882				882
Other comprehensive income	367						367
Ending balance at Mar. 31, 2019	142,616		$ 143,666	$ 8,480	(8,753)		(777)
Ending balance (in shares) at Mar. 31, 2019			22,018,000	1,467,000
Beginning balance at Dec. 31, 2018	$ 141,374	(207)	$ 143,466	$ 8,480	(9,428)	(207)	(1,144)
Beginning balance (in shares) at Dec. 31, 2018			21,916,000	1,467,000
Increase (Decrease) in Stockholders' Equity
Common stock options exercised (in shares)	18,250
Net income	$ 5,239
Ending balance at Sep. 30, 2019	148,034		$ 152,883	$ 0	(4,395)		(454)
Ending balance (in shares) at Sep. 30, 2019			23,521,000	0
Beginning balance at Dec. 31, 2018	141,374	$ (207)	$ 143,466	$ 8,480	(9,428)	$ (207)	(1,144)
Beginning balance (in shares) at Dec. 31, 2018			21,916,000	1,467,000
Increase (Decrease) in Stockholders' Equity
Other comprehensive income	577
Ending balance at Dec. 31, 2019	149,048		$ 153,570		(3,955)		(567)
Ending balance (in shares) at Dec. 31, 2019			23,574,000
Beginning balance at Mar. 31, 2019	142,616		$ 143,666	$ 8,480	(8,753)		(777)
Beginning balance (in shares) at Mar. 31, 2019			22,018,000	1,467,000
Increase (Decrease) in Stockholders' Equity
Issuance of restricted stock, net	0
Issuance of restricted stock, net (in shares)			15,000
Exchange Series A Non-Voting Preferred Stock to Non-Voting Common Stock	0		$ 8,480	$ (8,480)
Exchange Series A Non-Voting Preferred Stock to Non-Voting Common Stock (in shares)			1,467,000	(1,467,000)
Common stock based compensation expense	219		$ 219
Common stock options exercised	80		$ 80
Common stock options exercised (in shares)			15,000
Net income	2,728				2,728
Other comprehensive income	273						273
Ending balance at Jun. 30, 2019	145,916		$ 152,445	$ 0	(6,025)		(504)
Ending balance (in shares) at Jun. 30, 2019			23,515,000	0
Increase (Decrease) in Stockholders' Equity
Issuance of restricted stock, net	0
Issuance of restricted stock, net (in shares)			3,000
Common stock based compensation expense	416		$ 416
Common stock options exercised	$ 22		$ 22
Common stock options exercised (in shares)	3,250		3,000
Net income	$ 1,630				1,630
Other comprehensive income	50						50
Ending balance at Sep. 30, 2019	148,034		$ 152,883	$ 0	(4,395)		(454)
Ending balance (in shares) at Sep. 30, 2019			23,521,000	0
Beginning balance at Dec. 31, 2019	149,048		$ 153,570		(3,955)		(567)
Beginning balance (in shares) at Dec. 31, 2019			23,574,000
Increase (Decrease) in Stockholders' Equity
Issuance of restricted stock, net	0
Issuance of restricted stock, net (in shares)			19,000
Common stock based compensation expense	214		$ 214
Common stock options exercised	50		$ 50
Common stock options exercised (in shares)			11,000
Net income	(2,360)				(2,360)
Other comprehensive income	547						547
Ending balance at Mar. 31, 2020	147,499		$ 153,834		(6,315)		(20)
Ending balance (in shares) at Mar. 31, 2020			23,604,000
Beginning balance at Dec. 31, 2019	$ 149,048		$ 153,570		(3,955)		(567)
Beginning balance (in shares) at Dec. 31, 2019			23,574,000
Increase (Decrease) in Stockholders' Equity
Common stock options exercised (in shares)	10,728
Net income	$ 4,631
Other comprehensive income	679
Ending balance at Sep. 30, 2020	155,050		$ 154,262		676		112
Ending balance (in shares) at Sep. 30, 2020			23,644,000
Beginning balance at Mar. 31, 2020	147,499		$ 153,834		(6,315)		(20)
Beginning balance (in shares) at Mar. 31, 2020			23,604,000
Increase (Decrease) in Stockholders' Equity
Issuance of restricted stock, net	0
Issuance of restricted stock, net (in shares)			23,000
Common stock based compensation expense	212		$ 212
Net income	1,905				1,905
Other comprehensive income	141						141
Ending balance at Jun. 30, 2020	149,757		$ 154,046		(4,410)		121
Ending balance (in shares) at Jun. 30, 2020			23,627,000
Increase (Decrease) in Stockholders' Equity
Restricted stock forfeited	0
Restricted stock forfeited (in shares)			(8,000)
Restricted stock exchanged for common stock (shares)			25,000
Common stock based compensation expense	$ 216		$ 216
Common stock options exercised (in shares)	0
Net income	$ 5,086				5,086
Other comprehensive income	(9)						(9)
Ending balance at Sep. 30, 2020	$ 155,050		$ 154,262		$ 676		$ 112
Ending balance (in shares) at Sep. 30, 2020			23,644,000