Schedule I - Condensed Financial Information of the Registrant - Condensed Balance Sheets (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Cash and cash equivalents $ 94,977 $ 81,689
Prepaid expenses 4,878 4,210
Total current assets 185,075 159,268
Other long-term assets 7,394 10,259
Total assets 732,811 740,778
Total current liabilities 55,481 42,903
Total liabilities 691,240 686,995
Common stock 369 364
Additional paid-in capital 392,161 379,917
Retained earnings (344,889) (321,412)
Accumulated other comprehensive loss (6,070) (5,086)
Total stockholders’ equity 41,571 53,783
Total liabilities and stockholders’ equity 732,811 740,778
Parent Company [Member]    
Cash and cash equivalents 2,931 474
Intercompany Receivables 7 8
Prepaid expenses 32 27
Total current assets 2,970 509
Investment in subsidiaries 42,454 54,681
Other long-term assets 8 8
Total assets 45,432 55,198
Intercompany payables 3,861 1,415
Total current liabilities 3,861 1,415
Total liabilities 3,861 1,415
Common stock 369 364
Additional paid-in capital 392,161 379,917
Retained earnings (344,889) (321,412)
Accumulated other comprehensive loss (6,070) (5,086)
Total stockholders’ equity 41,571 53,783
Total liabilities and stockholders’ equity $ 45,432 $ 55,198