Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.010	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	5,000,000
Preferred stock, shares issued (in shares)		1,495,000
Preferred stock, shares outstanding (in shares)		1,495,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.001
Common stock, shares authorized (in shares)	65,000,000	150,000,000
Common stock, shares issued (in shares)	9,371,000	25,587,000
Common stock, shares outstanding (in shares)	9,371,000	25,587,000