CORRECTION OF IMMATERIAL ERRORS (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Error Corrections and Prior Period Adjustments Restatement
Accounts receivable, net	$ 55,078	$ 57,189
Other receivables	6,874	5,688
Prepaid expenses and other current assets	4,816	7,675
Accounts payable	23,759	23,482
Accrued expenses	7,313	9,366
Retained earnings	78,596	78,467
Total stockholders' equity	$ 82,511	81,273
As Reported
Error Corrections and Prior Period Adjustments Restatement
Accounts receivable, net		56,003
Other receivables		5,104
Prepaid expenses and other current assets		7,224
Accounts payable		22,453
Accrued expenses		8,977
Retained earnings		77,664
Total stockholders' equity		80,470
Adjustments | Correction of immaterial errors
Error Corrections and Prior Period Adjustments Restatement
Accounts receivable, net		1,186
Other receivables		584
Prepaid expenses and other current assets		451
Accounts payable		1,029
Accrued expenses		389
Retained earnings		803
Total stockholders' equity		$ 803