Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Total Stockholders' Equity	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interest
Beginning Balance (in shares) at Dec. 31, 2014			20,636,478
Beginning Balance, value at Dec. 31, 2014	$ 324,333	$ 284,621	$ 10,318	$ 212,763	$ (6,899)	$ 68,439	$ 39,712
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,912	2,950				2,950	(38)
Other comprehensive income	(3)	(3)			(3)
Restricted stock issuance (in shares)			85,584
Restricted stock issuance	0	0	$ 43	(43)
Stock compensation	3,922	3,922		3,922
Shares withheld for taxes and tax benefit of vested shares (in shares)			(33,908)
Shares withheld for taxes and tax benefit of vested shares	(921)	(921)	$ (17)	(904)
Warrants exercised	1,065	1,065		1,065
Ending Balance (in shares) at Dec. 31, 2015			20,688,154
Ending Balance, value at Dec. 31, 2015	331,308	291,634	$ 10,344	216,803	(6,902)	71,389	39,674
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	515	558				558	(43)
Other comprehensive income	663	663			663
Restricted stock issuance (in shares)			200,240
Restricted stock issuance	0	0	$ 100	(100)
Stock compensation	4,881	4,881		4,881
Shares withheld for taxes and tax benefit of vested shares (in shares)			(78,093)
Shares withheld for taxes and tax benefit of vested shares	(2,900)	(2,900)	$ (39)	(2,861)
Centennial redemption of withdrawing member interest	0	11,039		11,039			(11,039)
Ending Balance (in shares) at Dec. 31, 2016			20,810,301
Ending Balance, value at Dec. 31, 2016	334,467	305,875	$ 10,405	229,762	(6,239)	71,947	28,592
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,579)	(1,555)				(1,555)	(24)
Other comprehensive income	975	975			975
Restricted stock issuance (in shares)			136,777
Restricted stock issuance	(1)	(1)	$ 69	(70)
Stock compensation	4,107	4,107		4,107
Shares withheld for taxes and tax benefit of vested shares (in shares)			(52,901)
Shares withheld for taxes and tax benefit of vested shares	(1,026)	(1,026)	$ (27)	(999)
Rights offering, net (in shares)			5,000,596
Rights offering, net	89,867	89,867	$ 2,500	87,367
Ending Balance (in shares) at Dec. 31, 2017			25,894,773
Ending Balance, value at Dec. 31, 2017	$ 426,810	$ 398,242	$ 12,947	$ 320,167	$ (5,264)	$ 70,392	$ 28,568