Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2019
Allowance for doubtful accounts	$ 8,162	$ 5,933
Temporary equity, shares authorized (in shares)	10,000,000	10,000,000
Temporary equity, par (in usd per share)	$ 0.001	$ 0.001
Temporary equity, shares issued (in shares)	54,882	54,882
Temporary equity, shares outstanding (in shares)	798,788	798,788
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, par (in USD per share)	$ 0.001	$ 0.001
Common stock, shares, issued (in shares)	19,254,090	18,073,763
Common stock, shares, outstanding (in shares)	19,254,090	18,073,763
Treasury stock, shares (in shares)	5,285,085	5,088,782
Cash Dividends
Convertible preferred stock, dividend rate	5.50%	5.50%
Paid-in-kind Dividends
Convertible preferred stock, dividend rate	8.50%	8.50%

Amount of allowance for credit loss on accounts receivable, classified as current.

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