Restatement of previously issued financial statements (unaudited) (Details) - USD ($) |
Dec. 31, 2020 |
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
|---|---|---|---|---|---|
| Profit Share liability | $ 2,305,308 | $ 2,328,845 | |||
| Secured note payable | 271,686 | 271,686 | |||
| Unsecured convertible notes and warrants | 9,894,284 | 7,911,898 | |||
| Total liabilities | 20,579,897 | 18,146,889 | |||
| Stockholders' deficit | |||||
| Additional paid-in capital | 50,202,478 | 48,708,085 | |||
| Accumulated deficit | (63,484,106) | (57,658,484) | |||
| Total liabilities and stockholders' deficit | $ 7,376,365 | $ 9,273,238 | |||
| As restated [Member] | |||||
| Profit Share liability | $ 2,210,230 | $ 2,097,655 | $ 1,991,940 | ||
| Secured note payable | 271,686 | ||||
| Unsecured convertible notes and warrants | 7,413,593 | 6,915,288 | 6,422,400 | ||
| Total liabilities | 17,048,634 | 16,571,960 | 14,811,797 | ||
| Stockholders' deficit | |||||
| Additional paid-in capital | 48,294,413 | 48,158,130 | 46,198,194 | ||
| Accumulated deficit | (56,170,208) | (55,366,550) | (52,619,977) | ||
| Total stockholders' deficit | (7,799,048) | (7,131,710) | (6,345,537) | ||
| Total liabilities and stockholders' deficit | 9,249,586 | 9,440,250 | 8,466,260 | ||
| Adjustment [Member] | |||||
| Profit Share liability | 2,210,230 | 2,097,655 | 1,991,940 | ||
| Secured note payable | 0 | ||||
| Unsecured convertible notes and warrants | (2,339,289) | (2,179,831) | (1,981,568) | ||
| Total liabilities | (129,059) | (82,176) | 10,372 | ||
| Stockholders' deficit | |||||
| Additional paid-in capital | 3,412,204 | 3,412,204 | 3,412,204 | ||
| Accumulated deficit | (3,283,145) | (3,330,028) | (3,422,576) | ||
| Total stockholders' deficit | 129,059 | 82,176 | (10,372) | ||
| Total liabilities and stockholders' deficit | 0 | 0 | 0 | ||
| As previously reported [Member] | |||||
| Profit Share liability | 0 | 0 | 0 | ||
| Secured note payable | 271,686 | ||||
| Unsecured convertible notes and warrants | 9,752,882 | 9,095,119 | 8,403,968 | ||
| Total liabilities | 17,177,693 | 16,654,136 | 14,801,425 | ||
| Stockholders' deficit | |||||
| Additional paid-in capital | 44,882,209 | 44,745,926 | 42,785,990 | ||
| Accumulated deficit | (52,887,063) | (52,036,522) | (49,197,401) | ||
| Total stockholders' deficit | (7,928,107) | (7,213,886) | (6,335,165) | ||
| Total liabilities and stockholders' deficit | $ 9,249,586 | $ 9,440,250 | $ 8,466,260 |