CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital & Accumulated Other Comprehensive Loss	Retained Earnings	2012 Equity Plan	2012 Equity Plan Common Stock	2012 Equity Plan Additional Paid-In Capital & Accumulated Other Comprehensive Loss
Beginning balance (shares) at Dec. 31, 2016		20,525,614
Beginning balance at Dec. 31, 2016	$ 322,087	$ 2	$ 104,810	$ 217,275
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(15,306)			(15,306)
Issuance of common stock under the Employee Stock Purchase Plan (shares)		17,760
Issuance of common stock under the Employee Stock Purchase Plan	256		256
Issuance of restricted common stock under the Equity Plan (shares)		21,296				143,394
Issuance of restricted common stock under the Equity Plan	148		(11)	159	$ 0		$ 0
Amortization of stock based compensation	3,688		3,688
Cash dividends declared	(10,332)			(10,332)
Common stock repurchase program (shares)		(572,550)
Common stock repurchase program	(10,023)		(10,023)
Ending balance (shares) at Dec. 31, 2017		20,135,514
Ending balance at Dec. 31, 2017	290,529	$ 2	98,731	191,796
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(1,479)			(1,479)
Adjustment to beginning balance due to adoption of ASC 606 and related tax impact	4,944		(166)	5,110
Issuance of common stock under the Employee Stock Purchase Plan (shares)		20,120
Issuance of common stock under the Employee Stock Purchase Plan	247		247
Issuance of restricted common stock under the Equity Plan (shares)		24,989				199,991
Issuance of restricted common stock under the Equity Plan					0		0
Amortization of stock based compensation	4,954		4,954
Purchase of common stock for tax withholding (shares)		(62,432)
Purchase of common stock for tax withholding	(976)		(976)
Cash dividends declared	(10,133)			(10,133)
Common stock repurchase program (shares)		(929,116)
Common stock repurchase program	(13,483)		(13,483)
Ending balance (shares) at Dec. 31, 2018		19,389,066
Ending balance at Dec. 31, 2018	274,554	$ 2	89,258	185,294
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(10,765)			(10,765)
Issuance of common stock under the Employee Stock Purchase Plan (shares)		23,299
Issuance of common stock under the Employee Stock Purchase Plan	264		264
Issuance of restricted common stock under the Equity Plan (shares)		32,145				233,507
Issuance of restricted common stock under the Equity Plan	154			154	$ 0		$ 0
Amortization of stock based compensation	3,643		3,643
Purchase of common stock for tax withholding (shares)		(74,049)
Purchase of common stock for tax withholding	(1,017)		(1,017)
Cash dividends declared	(9,864)			(9,864)
Common stock repurchase program (shares)		(532,354)
Common stock repurchase program	(6,575)		(6,575)
Ending balance (shares) at Dec. 31, 2019		19,071,614
Ending balance at Dec. 31, 2019	$ 250,094	$ 2	$ 85,273	$ 164,819