Condensed Consolidated Balance Sheets (Parenthetical)	Sep. 30, 2019 $ / shares shares	Dec. 31, 2018 $ / shares shares
Statement Of Financial Position [Abstract]
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	882,268	432,286
Common stock, shares outstanding	882,268	432,286
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0