Condensed Consolidated Statement of Stockholders' Equity (Deficit) - 6 months ended Jun. 30, 2017 - USD ($) $ in Thousands |
Total |
Initial Public Offering [Member] |
Bridge Loan [Member] |
Bridge Loan [Member]
Initial Public Offering [Member]
|
Series B Redeemable Convertible Preferred Stock [Member] |
Series B Redeemable Convertible Preferred Stock [Member]
Initial Public Offering [Member]
|
Series A Redeemable Convertible Preferred Stock [Member] |
Series A Redeemable Convertible Preferred Stock [Member]
Initial Public Offering [Member]
|
Acacia Note [Member]
Initial Public Offering [Member]
|
Common Stock [Member] |
Common Stock [Member]
Initial Public Offering [Member]
|
Common Stock [Member]
Bridge Loan [Member]
|
Common Stock [Member]
Bridge Loan [Member]
Initial Public Offering [Member]
|
Common Stock [Member]
Series B Redeemable Convertible Preferred Stock [Member]
Initial Public Offering [Member]
|
Common Stock [Member]
Series A Redeemable Convertible Preferred Stock [Member]
Initial Public Offering [Member]
|
Common Stock [Member]
Acacia Note [Member]
Initial Public Offering [Member]
|
Additional Paid-in Capital [Member] |
Additional Paid-in Capital [Member]
Initial Public Offering [Member]
|
Additional Paid-in Capital [Member]
Bridge Loan [Member]
|
Additional Paid-in Capital [Member]
Bridge Loan [Member]
Initial Public Offering [Member]
|
Additional Paid-in Capital [Member]
Series B Redeemable Convertible Preferred Stock [Member]
Initial Public Offering [Member]
|
Additional Paid-in Capital [Member]
Series A Redeemable Convertible Preferred Stock [Member]
Initial Public Offering [Member]
|
Additional Paid-in Capital [Member]
Acacia Note [Member]
Initial Public Offering [Member]
|
Accumulated Deficit [Member] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beginning balance at Dec. 31, 2016 | $ (45,525) | $ 4 | $ (293) | $ (45,236) | ||||||||||||||||||||
| Beginning balance, shares at Dec. 31, 2016 | 2,620,803 | |||||||||||||||||||||||
| Issuance of common stock | $ 32,534 | $ 3,666 | $ 3 | $ 0 | $ 32,531 | $ 3,666 | ||||||||||||||||||
| Issuance of common stock, shares | 12,335,265 | 2,500,000 | 2,500,000 | 300,000 | ||||||||||||||||||||
| Conversion of preferred stock upon public offering | $ 18,668 | $ 8,598 | $ 2 | $ 3 | $ 18,666 | $ 8,595 | ||||||||||||||||||
| Conversion of preferred stock upon public offering, shares | 2,309,135 | 2,922,798 | 2,309,135 | 2,922,798 | ||||||||||||||||||||
| Exercise of Primary Warrant upon public offering | $ 29,263 | $ 2 | $ 29,261 | |||||||||||||||||||||
| Exercise of Primary Warrant upon public offering, shares | 2,150,335 | |||||||||||||||||||||||
| Conversion of debt and accrued interest upon public offering | $ 8,045 | $ 20,737 | $ 1 | $ 2 | $ 8,044 | $ 20,735 | ||||||||||||||||||
| Conversion of debt and accrued interest upon public offering, shares | 590,717 | 590,717 | 1,523,746 | |||||||||||||||||||||
| Issuance of restricted stock | $ 0 | $ 0 | 0 | 0 | ||||||||||||||||||||
| Issuance of restricted stock, shares | 34,333 | |||||||||||||||||||||||
| Repurchase of common stock | (56) | $ 0 | (56) | |||||||||||||||||||||
| Repurchase of common stock, shares | (7,500) | |||||||||||||||||||||||
| Exercise of options | $ 3 | $ (2) | 5 | |||||||||||||||||||||
| Exercise of options, shares | 1,580 | 1,580 | ||||||||||||||||||||||
| Issuance of warrants | $ 8,658 | 8,658 | ||||||||||||||||||||||
| Beneficial conversion feature | 554 | 554 | ||||||||||||||||||||||
| Modification of warrants | 371 | 371 | ||||||||||||||||||||||
| Stock-based compensation expense | 1,903 | 1,903 | ||||||||||||||||||||||
| Accretion of redeemable convertible preferred stock | (4,470) | (4,470) | ||||||||||||||||||||||
| Net loss | (27,442) | (27,442) | ||||||||||||||||||||||
| Ending balance at Jun. 30, 2017 | $ 55,507 | $ 15 | $ 132,640 | $ (77,148) | ||||||||||||||||||||
| Ending balance, shares at Jun. 30, 2017 | 14,956,068 |