Stockholders' Equity - Stock Options Activities (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares
Number
Options outstanding at the beginning of the year (in shares) | shares	1,022,763
Granted (in shares) | shares	0
Exercised (in shares) | shares	(215,893)
Forfeited (in shares) | shares	(3,000)
Options outstanding at the end of the period (in shares) | shares	803,870	1,022,763
Options exercisable at the end of the year (in shares) | shares	787,775
Weighted average exercise price
Options outstanding at the beginning of the year, weighted average exercise price (in dollars per share) | $ / shares	$ 6.862
Granted, weighted average exercise price (in dollars per share) | $ / shares	0
Exercised, weighted average exercise price (in dollars per share) | $ / shares	6.128
Forfeited, weighted average exercise price (in dollars per share) | $ / shares	2.077
Options outstanding at the end of the period, weighted average exercise price (in dollars per share) | $ / shares	7.077	$ 6.862
Options exercisable at the end of the year, weighted average exercise price (in dollars per share) | $ / shares	$ 7.106
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options outstanding at the beginning of the year, aggregate intrinsic value | $	$ 33,524	$ 47,417
Options exercisable at the end of the year, aggregate intrinsic value | $	$ 32,830
Options outstanding at the beginning of the year, weighted average remaining contractual life (Year)	2 years 9 months	3 years 5 months 12 days
Options exercisable at the end of the year, weighted average remaining contractual life (Year)	2 years 7 months 20 days