General form of registration statement for all companies including face-amount certificate companies

Consolidated Balance Sheets (Parenthetical)

v3.8.0.1
Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Allowance for doubtful accounts $ 69 $ 0 $ 0
Convertible notes payable, discounts $ 0 $ 6,898 $ 0
Preferred stock, par value $ 0.001    
Preferred stock, shares authorized 1,000,000    
Preferred stock, shares issued 0    
Preferred stock, shares outstanding 0    
Common stock, par value $ 0.001 $ 0.001 $ 0.001
Common stock, shares authorized 75,000,000 38,500,000 38,500,000
Common stock, shares issued 14,956,322 2,620,803 1,301,249
Common stock, shares outstanding 14,956,322 2,620,803 1,301,249
Series B Redeemable Convertible Preferred Stock [Member]      
Preferred Stock, par value $ 0.001 $ 0.001 $ 0.001
Preferred Stock, authorized 0 3,092,781 3,092,781
Preferred Stock, issued 0 3,092,781 3,092,781
Preferred Stock, outstanding 0 3,092,781 3,092,781
Preferred Stock, liquidation preference $ 0 $ 18,138 $ 16,800
Series A Redeemable Convertible Preferred Stock [Member]      
Preferred Stock, par value $ 0.001 $ 0.001 $ 0.001
Preferred Stock, authorized 0 5,666,667 5,666,667
Preferred Stock, issued 0 3,914,697 3,000,000
Preferred Stock, outstanding 0 3,914,697 3,000,000
Preferred Stock, liquidation preference $ 0 $ 8,353 $ 5,929
Series A-1 Redeemable Convertible Preferred Stock [Member]      
Preferred Stock, par value $ 0.001 $ 0.001 $ 0.001
Preferred Stock, authorized 0 2,666,667 2,666,667
Preferred Stock, issued 0 0 914,697
Preferred Stock, outstanding 0 0 914,697
Preferred Stock, liquidation preference $ 0 $ 0 $ 1,808