Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
REVENUES:
Total revenues	$ 294,022	$ 326,160
COSTS OF REVENUES:
Total costs of revenues	219,801	240,863
Gross profit	74,221	85,297
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	73,334	78,800
Income from operations	887	6,497
INTEREST EXPENSE, net	1,896	2,499
Income (loss) from operations before income taxes	(1,009)	3,998
INCOME TAX EXPENSE	1,161	2,770
NET INCOME (LOSS)	$ (2,170)	$ 1,228
NET INCOME (LOSS) PER SHARE:
Basic (in usd per share)	$ (0.11)	$ 0.06
Diluted (in usd per share)	$ (0.11)	$ 0.06
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING:
Basic (in shares)	19,449	19,203
Diluted (in shares)	19,449	19,826
COMPREHENSIVE INCOME (LOSS):
Net income (loss)	$ (2,170)	$ 1,228
Foreign currency translation adjustment, net of taxes	(308)	(1,063)
TOTAL COMPREHENSIVE INCOME (LOSS)	(2,478)	165
Service fee revenue
REVENUES:
Total revenues	214,382	230,484
COSTS OF REVENUES:
Total costs of revenues	141,616	146,827
Product revenue, net
REVENUES:
Total revenues	26,613	34,350
COSTS OF REVENUES:
Total costs of revenues	25,158	32,710
Pass-through revenue
REVENUES:
Total revenues	53,027	61,326
COSTS OF REVENUES:
Total costs of revenues	$ 53,027	$ 61,326