Note 3 - Short Term Investments Available for Sale (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Available-for-sale Securities [Table Text Block]

	December 31, 201 6				December 31, 201 5
	Cost		Fair Value		Cost		Fair Value
Short-term investments
Certificate of deposit	$	1,680,000	$	1,680,000	$	4,800,000	$	4,798,810
Bonds - corporate issuances		–		–		6,003,748		6,001,080
Total short-term investments	$	1,680,000	$	1,680,000	$	10,803,748	$	10,799,890

	December 31, 201 6				December 31, 201 5
	Cost		Fair Value		Cost		Fair Value
Short-term investment maturities
Within 3 months	$	1,680,000	$	1,680,000	$	10,803,748	$	10,799,890
Between 3-12 months		–		–		–		–
Total	$	1,680,000	$	1,680,000	$	10,803,748	$	10,799,890

Investment Income [Table Text Block]

	201 6			201 5
Interest and dividends accrued and paid	$	31,262		$	186,322
Accretion of investment premium		(3,808	)		(122,998	)
(Losses) gains on investment maturity and sales, net		(532	)		264
Investment income net	$	26,922		$	63,588

Schedule of Unrealized Loss on Investments [Table Text Block]

	December 31, 201 5
Description of Investment Securities	Fair Value		Unrealized Holding Gains (Losses)
Available for sale (all unrealized holding gains and losses are less than 12 months at date of measurement)
Short-term investments with unrealized gains – Certificates of deposit	$	240,024	$	24
Short-term investments with unrealized losses – Certificates of deposit		4,558,786		(1,214	)
Short-term investments with unrealized losses – Bonds - corporate issuances		6,001,080		(2,668	)
Total	$	10,799,890	$	(3,858	)