Subsequent Event (Details) - Subsequent Event $ / shares in Units, $ in Millions |
Jul. 25, 2018
USD ($)
$ / shares
shares
|
|---|---|
| Subsequent Event [Line Items] | |
| Common stock, shares issued | shares | 4,427,563 |
| Sale of stock, price per share | $ / shares | $ 0.50 |
| Proceeds from issuance of common stock | $ | $ 2.2 |