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Note 7 - Loan Payable to Officer | 12 Months Ended
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Dec. 31, 2016
Notes to Financial Statements |
Related Party Transactions Disclosure [Text Block] | 7. Borrowings from Officer On February 4, 2016, the Company entered into an unsecured revolving promissory note to borrow up to $2,200,000 from G. Ward Paxton, the Company’s Chief Executive Officer (the “CEO Note”). Under the terms of the CEO Note, the Company may borrow, repay and reborrow on the loan as needed up to an outstanding principal balance due of $2,200,000 at any given time through March 2018. On September 30, 2016, the Company renewed the CEO Note on the same terms, with the Company being able to borrow, repay and reborrow on the CEO Note as needed up to an outstanding principal balance due of $2,700,000 at any given time through March 2018. On February 9, 2017, the Company renewed the CEO Note on the same terms, with the Company being able to borrow, repay and reborrow on the CEO Note as needed up to an outstanding principal balance due of $3,400,000 at any given time through March 2019. Amounts borrowed under the CEO Note officer accrue interest at a floating rate per annum equal to Silicon Valley Bank’s (“SVB”) prime rate plus 1% (5% at September 30, 2016). All outstanding borrowings and accrued but unpaid interest is due on March 31, 2019. As of December 31, 2016, the borrowings outstanding totaled $2,885,000 and accrued interest totaled $184,000.

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