Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.19.3.a.u2
Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Accounts receivable, allowance $ 121 $ 128
Convertible preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Convertible preferred stock, shares authorized (in shares) 10,000,000 10,000,000
Convertible preferred stock, shares issued (in shares) 0 0
Convertible preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 141,429,000 141,429,000
Common stock, shares issued (in shares) 86,920,000 62,963,000
Common stock, shares outstanding (in shares) 86,920,000 62,963,000