Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Additional Information 1 (Detail)

v3.10.0.1
Common Stock - Additional Information 1 (Detail) - USD ($)
 6 Months Ended
Jun. 30, 2018
Jun. 19, 2018
Jun. 15, 2018
Jun. 30, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Preferred stock, par value $ 0.001     $ 0.001 $ 0.001
Warrant exercisable period   5 years      
Exercise price per unit of warrant   $ 4.00      
Cancellation of warrant description       Additionally, subject to certain exceptions, if, after the June 19, 2018, (i) the volume weighted average price of our common stock for each of 30 consecutive trading days, or the Measurement Period, which Measurement Period commences on June 19, 2018, exceeds 300% of the exercise price (subject to adjustments for stock splits, recapitalizations, stock dividends and similar transactions), (ii) the average daily trading volume for such Measurement Period exceeds $500,000 per trading day and (iii) certain other equity conditions are met, and subject to a beneficial ownership limitation, then we may call for cancellation of all or any portion of the Warrants then outstanding.  
Number of required consecutive days weighted average trading price for cancelation or recall of warrants   30 days      
Minimum required trading price percentage over exercise price for cancelation or recall of warrants   300.00%      
Minimum required trading volume value per day for cancelation or recall of warrants   $ 500,000      
Gross proceeds from sale of units       $ 13,800  
Warrant issuance costs       1,600  
Net proceeds from issuance of warrants       $ 12,200  
Preferred stock, shares outstanding 3,283     3,283 0
Ladenburg Thalmann & Co. Inc [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Period granted for underwriting option     45 days    
Ladenburg Thalmann & Co. Inc [Member] | Overallotment Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Additional purchase of common stock and warrants, maximum     450,000    
Overallotment option exercise date     Jun. 18, 2018    
Series A Convertible Preferred Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Preferred stock, shares converted 6,627        
Preferred stock, shares outstanding 2,531     2,531  
Series A Convertible Preferred Stock [Member] | Common Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Convertible preferred stock, shares issued upon conversion 1,656,750        
Class A Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Issuance of new units in a public offering   710,500      
Public offering, price per unit   $ 4.00      
Description of stock units issued       Each Class A Unit consisted of one share of our common stock and a warrant to purchase one share of common stock.  
Class B Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Issuance of new units in a public offering   9,158      
Public offering, price per unit   $ 1,000      
Description of stock units issued       Each Class B Unit consisted of one share of Series A Convertible Preferred Stock par value $0.001 per share convertible into 250 shares of common stock and warrants to purchase 250 shares of common stock.  
Number of common shares issuable for each share of convertible preferred stock   250      
Number of common shares issuable conversion of warrants   250      
Class B Units [Member] | Series A Convertible Preferred Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Preferred stock, par value   $ 0.001