Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2018	Jun. 30, 2017		Dec. 31, 2017
Income Statement [Abstract]
Revenue	$ 24,698	$ 17,125	[1]	$ 47,593	$ 33,467	[1]
Gross profit	6,340	5,017		11,238	9,139
(Benefit) provision for income taxes	(449)	234		(190)	307
Net loss	981	$ 827		(515)	561
Balance Sheet [Abstract]
Contract receivables, net	19,221			19,221
Deferred tax assets	6,387			6,387			$ 6,494
Billings in excess of revenue earned	9,557			9,557			14,543
Accumulated deficit	(42,730)			(42,730)			(42,870)
Change in fair value of contingent consideration				0	$ 297
Effect of Change [Member]
Income Statement [Abstract]
Revenue	(164)			(121)
Gross profit	(164)			(121)
(Benefit) provision for income taxes	123			95
Net loss	(41)			(26)
Balance Sheet [Abstract]
Contract receivables, net	(10)			(10)
Deferred tax assets	(146)			(146)
Billings in excess of revenue earned	(785)			(785)
Accumulated deficit	629			629			$ 655
Balance Without Adoption of ASC 606 [Member]
Income Statement [Abstract]
Revenue	24,862			47,714
Gross profit	6,504			11,359
(Benefit) provision for income taxes	(326)			(95)
Net loss	1,022			(489)
Balance Sheet [Abstract]
Contract receivables, net	19,231			19,231
Deferred tax assets	6,533			6,533
Billings in excess of revenue earned	10,342			10,342
Accumulated deficit	$ (43,359)			$ (43,359)

[1] Prior period amounts have not been adjusted under the modified retrospective transition method for the adoption of ASC 606.