Common Stock Equivalents Excluded From Diluted Net Income (Loss) Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	5,534	7,842	7,813	7,842
RSUs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive		1,455	1,214	1,455
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	131	622	576	622
Warrants
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive		765	620	765
Shares of Common Stock Issuable upon Conversion of Series B Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	5,403	5,000	5,403	5,000