Redeemable Preferred Stock (Details) |
1 Months Ended | 3 Months Ended |
|---|---|---|
|
Nov. 30, 2018
USD ($)
shares
|
Mar. 31, 2019
USD ($)
installment
$ / shares
shares
|
|
| Series C Redeemable Convertible Preferred Stock | ||
| Redeemable preferred stock | ||
| Preferred Stock, Shares Outstanding | shares | 2,620 | |
| Dividend rate | 8.00% | |
| Original issue price | $ 248.794 | |
| Conversion price per share (in dollars per share) | $ / shares | $ 0.2343 | |
| Series E Redeemable Convertible Preferred Stock | ||
| Redeemable preferred stock | ||
| Shares issued (in shares) | shares | 35,000 | |
| Redeemable stock issued, par value (in dollars per share) | $ 0.01 | |
| Net proceeds from public offering | $ 30,900,000 | |
| Number of monthly installments | installment | 13 | |
| Redemption value for each installment | $ 2,700,000 | |
| Discount on market price | 15.00% | |
| Conversion price per share | $ / shares | $ 2.31 | |
| Liquidation preference percentage | 125.00% | |
| Redeemable stock issued, initial stated value (in dollars per share) | $ / shares | $ 1,000 |