Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Allowance for Doubtful Accounts	$ 1,397	$ 802
Common stock par value (in dollars per share)	$ 0.001	$ 0.001
Common stock authorized (in shares)	170,000,000	170,000,000
Common stock issued (in shares)	17,408,863	10,387,926
Common stock outstanding (in shares)	17,352,698	10,345,367
Treasury stock (in shares)	56,165	42,559
Convertible Preferred Stock
Convertible preferred stock par value (in dollars per share)	$ 0.001	$ 0.001
Convertible preferred stock authorized (in shares)	5,000,000	5,000,000
Convertible preferred stock issued (in shares)	0	0
Convertible preferred stock outstanding (in shares)	0	0

Amount of allowance for credit loss on accounts receivable.

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