Schedule II - Valuation and Qualifying Accounts Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Allowance for doubtful accounts:
The roll forward of valuation accounts were as follows:
Balance at beginning of period	$ 549	$ 476
Charged to costs and expenses	623	695
Deductions	(579)	(622)
Balance at end of period	593	549
Valuation allowance for deferred tax assets:
The roll forward of valuation accounts were as follows:
Balance at beginning of period	2,569	2,556
Charged to costs and expenses	0	13
Deductions	(1,334)	0
Balance at end of period	$ 1,235	$ 2,569