Subsequent Event	3 Months Ended
Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Event	10. Subsequent Event On March 28, 2019, the Company entered into a securities purchase agreement with accredited investors, pursuant to which it agreed to issue and sell to the investors in a private placement an aggregate of (i) 11,838,582 units, consisting of 11,838,582 shares of its common stock and associated common warrants to purchase an aggregate of 11,838,582 shares of common stock, for a combined price of $2.01 per unit and (ii) 1,096,741 units, consisting of pre-funded warrants to purchase 1,096,741 shares of the Company’s common stock and associated common warrants to purchase 1,096,741 shares of common stock, for a combined price of $2.01 per unit. The pre-funded warrants are exercisable at an exercise price of $0.01 per share and have no expiration. The common warrants are exercisable at an exercise price of $2.00 per share and expire five years from the date of issuance. On April 2, 2019, the Company closed the private placement and received aggregate gross proceeds of approximately $26,000, before deducting placement agent fees and offering expenses, and excluding the exercise of any warrants. The company paid placement agent fees of approximately $1,700.

Subsequent Event

3 Months Ended

Mar. 31, 2019

10. Subsequent Event

On March 28, 2019, the Company entered into a securities purchase agreement with accredited investors, pursuant to which it agreed to issue and sell to the investors in a private placement an aggregate of (i) 11,838,582 units, consisting of 11,838,582 shares of its common stock and associated common warrants to purchase an aggregate of 11,838,582 shares of common stock, for a combined price of $2.01 per unit and (ii) 1,096,741 units, consisting of pre-funded warrants to purchase 1,096,741 shares of the Company’s common stock and associated common warrants to purchase 1,096,741 shares of common stock, for a combined price of $2.01 per unit. The pre-funded warrants are exercisable at an exercise price of $0.01 per share and have no expiration. The common warrants are exercisable at an exercise price of $2.00 per share and expire five years from the date of issuance.

On April 2, 2019, the Company closed the private placement and received aggregate gross proceeds of approximately $26,000, before deducting placement agent fees and offering expenses, and excluding the exercise of any warrants. The company paid placement agent fees of approximately $1,700.