Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Information (Unaudited) (Details)

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Quarterly Financial Information (Unaudited) (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Quarterly Financial Information Unaudited [Abstract]                      
Revenue $ 4,233,000 $ 2,779,000 $ 3,037,000 $ 1,532,000 $ 1,953,000 $ 1,159,000 $ 2,186,000 $ 1,373,000 $ 11,581,496 $ 6,670,604 $ 8,094,368
Gross profit (loss) 703,000 348,000 796,000 81,000 (4,369,000) (231,000) 152,000 40,000 1,927,609 (4,408,121) 1,768,282
Net loss $ (3,590,000) $ (4,761,000) $ (4,239,000) $ (5,362,000) $ (9,583,000) $ (5,477,000) $ (5,056,000) $ (6,360,000) $ (17,952,172) $ (26,476,370) $ (21,875,713)
Net loss per share, basic and diluted $ (0.09) $ (0.13) $ (0.13) $ (0.18) $ (0.31) $ (0.18) $ (0.20) $ (0.25) $ 0.53 $ 0.94 $ 0.87
Net loss attributable to common stockholders $ (4,120,000) $ (5,281,000) $ (4,746,000) $ (5,861,000) $ (10,081,000) $ (5,967,000) $ (5,534,000) $ (6,826,000) $ (20,008,322) $ (28,408,230) $ (23,695,881)