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Condensed Balance Sheets (Unaudited) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 1,324,230 $ 3,379,508
Accounts receivable, net 2,531,672 2,687,325
Inventories, net 1,893,213 2,198,266
Prepaid expenses and other current assets 313,850 385,508
Deferred cost on shipments to distributors 195,932 204,405
Total current assets 6,258,897 8,855,012
Property and equipment:    
Machinery and office equipment 2,270,135 2,052,091
Computer equipment 976,262 851,823
Property and equipment, gross 3,246,397 2,903,914
Accumulated depreciation (2,485,206) (2,241,010)
Property and equipment, net 761,191 662,904
Goodwill 4,427,000 4,427,000
Other long-term assets 246,960 271,650
Deferred tax assets 5,788,695 5,637,480
Total assets 17,482,743 19,854,046
Current liabilities:    
Accounts payable and accrued expenses 1,207,471 1,112,234
Accrued payroll and related expenses 528,765 630,999
Deferred revenue on shipments to distributors 479,361 492,611
Current portion of deferred service revenue 31,573 31,536
Lines of credit 1,526,690
Term loan-current portion 500,000
Current portion of capital leases and deferred rent 58,110 55,382
Total current liabilities 4,331,970 2,322,762
Long-term portion of deferred service revenue 27,490 29,447
Long-term portion of capital leases and deferred rent 224,034 271,414
Term loan-long-term portion 458,333
Total liabilities 5,041,827 2,623,623
Stockholders’ equity:    
Common stock, $0.001 par value: Authorized – 20,000,000 shares, Issued and outstanding – 5,883,109 shares at September 30, 2018 and 7,011,128 shares at December 31, 2017 5,883 7,011
Additional paid-in capital 60,397,769 64,777,620
Accumulated deficit (47,962,736) (47,554,208)
Total stockholders’ equity 12,440,916 17,230,423
Total liabilities and stockholders’ equity $ 17,482,743 $ 19,854,046