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v3.21.1

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Cash flows from operating activities: |  |
Net loss | $ (5,383,832) | $ (7,959,349)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Stock-based compensation | 942,183 | 744,865
Depreciation and amortization | 95,680 | 97,419
Amortization of marketable securities discount | 54,278 | 1,176
Net noncash lease expense | 15,149 | 87,000
Other |  | 10,937
Changes in operating assets and liabilities: |  |
Accounts receivable, net | 11,227 | 224,096
Inventories | 118,889 | (638)
Prepaid expenses and other current assets | 381,543 | 238,376
Accounts payable | 31,589 | (1,562,615)
Accrued expenses and other current liabilities | (413,503) | (262,933)
Operating lease liabilities | (8,875) | (108,581)
Net cash used in operating activities | (4,155,672) | (8,490,247)
Cash flows from investing activities: |  |
Purchase of marketable securities | (5,082,730) |
Proceeds from maturities of marketable securities | 7,000,000 | 10,500,000
Net cash provided by investing activities | 1,917,270 | 10,500,000
Cash flows from financing activities: |  |
Proceeds from shares issued | 6,920,350 |
Net cash provided by financing activities | 6,920,350 |
Effect of changes in exchange rates on cash and cash equivalents | 140,500 | 46,952
Net increase in cash and cash equivalents | 4,822,448 | 2,056,705
Cash and cash equivalents – beginning of period | 4,241,937 | 13,563,791
Cash and cash equivalents – end of period | 9,064,385 | 15,620,496
Supplemental cash flows disclosures: |  |
Interest paid | 3,522 | 4,623
Supplemental schedule of noncash activity: |  |
2020 Accrued bonus awarded in equity | $ 399,997 |

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- References No definition available. + Details
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