Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Details)

v3.19.2
Subsequent Events - Additional Information (Details) - Subsequent Event - USD ($)
$ in Thousands
 1 Months Ended
Jul. 18, 2019
Jul. 16, 2019
Aug. 07, 2019
Series B Preferred Stock      
Subsequent Event [Line Items]      
Sale of stock sold under sale agreement (in shares)     229,294.000
Gross proceeds from issuance of stock     $ 5,700
Net proceeds from issuance of stock     5,200
Gladstone Securities      
Subsequent Event [Line Items]      
Dividends, preferred stock, stock     527
Over-Allotment Option [Member] | Common Stock      
Subsequent Event [Line Items]      
Sale of stock sold under sale agreement (in shares)   277,297  
Gross proceeds from issuance of stock $ 3,300    
Net proceeds from issuance of stock $ 3,100    
Unrelated third-parties | Gladstone Securities      
Subsequent Event [Line Items]      
Dividends, preferred stock, stock     $ 499