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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
Mar. 31, 2020
Sep. 30, 2019
ASSETS    
Cash and cash equivalents $ 16,398,928 $ 18,819,078
Short-term marketable securities 3,464,834 3,695,364
Restricted cash 264,633 263,136
Accounts receivable, net 5,849,608 3,644,059
Inventories, net 6,921,829 5,835,163
Prepaid expenses and other 994,644 1,781,837
Total current assets 33,894,476 34,038,637
Long-term marketable securities 1,646,466 1,384,819
Long-term restricted cash 395,293 434,704
Deferred tax assets, net 5,117,842 5,387,000
Property and equipment, net 2,105,633 2,269,506
Goodwill 2,318,863 2,305,750
Intangible assets, net 1,034,161 1,175,634
Operating lease right of use asset 5,534,154
Other assets 124,042 123,933
Total assets 52,170,930 47,119,983
LIABILITIES AND STOCKHOLDERS' EQUITY    
Accounts payable 1,932,485 859,530
Accrued liabilities 5,442,301 8,134,341
Notes payable, current portion 281,178 279,588
Operating lease liabilities, current portion 728,134
Total current liabilities 8,384,098 9,273,459
Notes payable, less current portion 16,546 32,903
Other liabilities, noncurrent 435,880 2,432,272
Operating lease liabilities, noncurrent 6,743,195
Total liabilities 15,579,719 11,738,634
Stockholders' equity:    
Preferred stock, $0.00001 par value; 5,000,000 shares authorized; none issued and outstanding
Common stock, $0.00001 par value; 50,000,000 shares authorized; 33,118,729 and 32,949,987 shares issued and outstanding, respectively 331 330
Additional paid-in capital 89,843,638 89,571,641
Accumulated deficit (52,810,001) (53,731,903)
Accumulated other comprehensive loss (442,757) (458,719)
Total stockholders' equity 36,591,211 35,381,349
Total liabilities and stockholders' equity $ 52,170,930 $ 47,119,983