Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Accounts receivable, allowance for doubtful accounts	$ 4,265	$ 3,783
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	12,000,000	12,000,000
Common stock, shares outstanding	11,400,000	12,000,000
Total current assets	$ 77,114	$ 82,922
Total current liabilities	115,314	80,347
VIE
Total current assets	37,408	45,815
Total current liabilities	28,652	28,383
VIE | Asset Pledged as Collateral
Total current assets	37,400	45,800
Assets, Noncurrent	237,000	247,800
Total current liabilities	28,700	28,400
Liabilities, Noncurrent	$ 3,400	$ 2,600