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Note 12 - Subsequent Event
 12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Subsequent Events [Text Block]
12.
Subsequent Events
 
On
February
 
9,
2017,
the Company amended the unsecured revolving promissory note to borrow up to
$3,400,000
from G. Ward Paxton, the Company’s Chief Executive Officer. Under the terms of the note, the Company
may
borrow, repay and reborrow on the loan as needed up to an outstanding principal balance due of
$3,400,000
at any given time through
March
 
2019
.