Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 3,783	$ 2,332
Preferred stock, par value	$ 0.01	$ 1.00
Preferred stock, shares authorized	1,000,000	5,000,000
Preferred stock, issued	0	0
Common stock, par value	$ 0.01	$ 0.20
Common stock, shares authorized	25,000,000	175,000,000
Common stock, shares issued	12,000,000	55,443,393
VIE Current assets pledged	$ 45,800	$ 28,800
VIE Non-current assets pledged	247,800	434,300
VIE Current liabilities, no recourse	28,400	32,200
VIE Non-current liabilities, no recourse	$ 2,600	$ 26,000