CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (39,506,375)	$ (24,401,829)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of fixed assets	66,494	38,424
Amortization of intangible assets	40,444	21,197
Non-cash operating lease expense	219,765
Provision for doubtful accounts	82,284	22,955
Share-based compensation	2,586,948	1,751,358
Amortization of deferred financing costs	120,146
Changes in operating assets and liabilities:
Accounts receivable	(3,963,214)	(790,885)
Inventory	(1,688,045)	(135,514)
Other current assets	987,794	1,506,152
Accounts payable	2,621,402	2,186,224
Accrued expenses and other liabilities	268,939	152,223
Net cash used in operating activities	(38,163,418)	(19,649,695)
CASH FLOWS FROM INVESTING ACTIVITIES
Patent costs	(403,496)	(142,136)
Purchase of fixed assets	(262,418)	(26,908)
Payment of security deposit		(11,486)
Net cash used in investing activities	(665,914)	(180,530)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from exercise of options	100,107	44,057
Net cash provided by financing activities	100,107	44,057
Decrease in cash	(38,729,225)	(19,786,168)
Cash, beginning of period	161,613,077	127,135,628
Cash, end of period	122,883,852	$ 107,349,460
Supplemental disclosure of cash flow information
Interest paid	$ 1,913,956

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