Quarterly report pursuant to Section 13 or 15(d)

Condensed Balance Sheets (Parenthetical)

v3.20.2
Condensed Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts, accounts receivable current $ 2,181 $ 2,004
Series A Convertible redeemable preferred stock, shares authorized 100,000 100,000
Series A Convertible redeemable preferred stock, par value $ 0.01 $ 0.01
Series A Convertible redeemable preferred stock, shares issued 54,000 51,000
Series A Convertible redeemable preferred stock, shares outstanding 54,000 51,000
Preferred stock, shares authorized 150,000 50,000
Preferred stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 75,000,000 75,000,000
Common stock, par value $ 0.01 $ 0.01
Common stock, shares issued 32,233,000 30,804,000
Common stock, shares outstanding 31,090,000 29,743,000
Treasury stock, shares 1,143,000 1,061,000