v3.21.1
Capital Stock - Additional Information (Detail)
1 Months Ended 3 Months Ended 12 Months Ended
Apr. 30, 2021
USD ($)
$ / shares
shares
Oct. 14, 2020
shares
Mar. 31, 2020
USD ($)
ConvertibleNote
$ / shares
shares
May 01, 2021
USD ($)
shares
May 02, 2020
USD ($)
Dec. 31, 2019
USD ($)
shares
Jan. 30, 2021
USD ($)
Feb. 29, 2020
USD ($)
Subsidiary Sale Of Stock [Line Items]                
Promissory note principal amount     $ 1,800,000 $ 6,348,000     $ 4,348,000 $ 16,400,000
Gain on extinguishment of debt         $ 13,642,000      
Debt conversion, description     Company entered into an additional debt restructuring that resulted in the conversion of debt with an aggregate principal amount of $7,492,000 and accrued interest of $691,000 into common stock of the Company. The carrying value of the debt and related derivative liability at the time of extinguishment amounted to $8,341,000. The aggregate total of $8,183,000 was converted into 4,814,000 shares of common stock at $1.70 per share.          
Debt conversion, aggregate principal amount     $ 7,492,000          
Debt conversion, accrued interest     691,000          
Debt aggregate conversion amount     $ 8,183,000          
Common stock issued | shares       0        
Reverse stock split   one-for-ten            
Stock split, conversion ratio   0.1            
Aggregate cash proceeds $ 124,000     $ 123,000        
Common Stock [Member]                
Subsidiary Sale Of Stock [Line Items]                
Debt exchange conversion units | shares     4,814,000          
Debt exchange conversion price per unit | $ / shares     $ 1.70          
Gain on extinguishment of debt     $ 6,472,000          
Debt and related derivative liability at the time of extinguishment     8,341,000          
Combined value of stock issued in conversion     $ 1,869,000          
Common stock issued | shares     1,068,000          
Reverse stock split   1-for-10            
Stock split, conversion ratio   0.1            
Stock issued during period, shares, reverse stock splits | shares   2,000            
Common stock exercised warrants | shares 246,672              
Strike price | $ / shares $ 0.50              
Common Stock [Member] | Other Expenses [Member]                
Subsidiary Sale Of Stock [Line Items]                
Common stock issued | shares           1,040,000    
Common stock issued, value           $ 415,000    
Common Stock [Member] | Simply Mac, Inc. [Member]                
Subsidiary Sale Of Stock [Line Items]                
Common stock issued | shares     1,040,000          
Exchange [Member]                
Subsidiary Sale Of Stock [Line Items]                
Number of convertible notes exchanged into common stock | ConvertibleNote     2          
Promissory note principal amount     $ 434,000          
Promissory notes accrued interest     8,000          
Debt exchange conversion aggregate amount     35,000          
Gain on extinguishment of debt     $ 204,000          
Exchange [Member] | Common Stock [Member]                
Subsidiary Sale Of Stock [Line Items]                
Debt exchange conversion units | shares     86,800          
Debt exchange conversion price per unit | $ / shares     $ 5.10