CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 286	$ 249
Current portion of term loan credit agreement, deferred costs	69	67
Revolving and term loan credit agreement, deferred costs	$ 150	$ 196
Common stock, authorized (in shares)	75,000,000	75,000,000
Common stock, issued (in shares)	43,170,000	35,861,000
Common stock, outstanding (in shares)	43,170,000	35,861,000