Note 8 - Long-term Investments (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule Of Long-Term Investments [Table Text Block]

<div style="display: inline; font-family: times new roman; font-size: 10pt"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse: collapse; min-; min-width: 700px;"> <tr style="vertical-align: bottom"> <td style="font-size: 10pt"> </td> <td style="font-size: 10pt; font-weight: bold; padding-bottom: 1pt"> </td> <td colspan="7" style="font-size: 10pt; font-weight: bold; text-align: center; border-bottom: Black 1pt solid">December 31</td> </tr> <tr style="vertical-align: bottom"> <td style="font-size: 10pt"> </td> <td style="font-size: 10pt; font-weight: bold"> </td> <td colspan="3" style="font-size: 10pt; font-weight: bold; text-align: center">2018</td> <td style="font-size: 10pt; font-weight: bold"> </td> <td colspan="3" style="font-size: 10pt; font-weight: bold; text-align: center">2017</td> </tr> <tr style="vertical-align: bottom"> <td style="font-size: 10pt"> </td> <td style="font-size: 10pt"> </td> <td colspan="3" style="font-size: 10pt"> </td> <td style="font-size: 10pt"> </td> <td colspan="3" style="font-size: 10pt"> </td> </tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="width: 64%; font-size: 10pt; text-align: left">Sigurd Cayman</td> <td style="width: 1%; font-size: 10pt"> </td> <td style="width: 1%; font-size: 10pt; text-align: left">$</td> <td style="width: 15%; font-size: 10pt; text-align: right"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">992</div></td> <td style="width: 1%; font-size: 10pt; text-align: left"> </td> <td style="width: 1%; font-size: 10pt"> </td> <td style="width: 1%; font-size: 10pt; text-align: left">$</td> <td style="width: 15%; font-size: 10pt; text-align: right"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">1,232</div></td> <td style="width: 1%; font-size: 10pt; text-align: left"> </td> </tr> <tr style="vertical-align: bottom; background-color: White"> <td style="font-size: 10pt">PVEF</td> <td style="font-size: 10pt"> </td> <td style="font-size: 10pt; text-align: left"> </td> <td style="font-size: 10pt; text-align: right"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">36</div></td> <td style="font-size: 10pt; text-align: left"> </td> <td style="font-size: 10pt"> </td> <td style="font-size: 10pt; text-align: left"> </td> <td style="font-size: 10pt; text-align: right"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">36</div></td> <td style="font-size: 10pt; text-align: left"> </td> </tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="font-size: 10pt; padding-bottom: 1pt">EMC</td> <td style="font-size: 10pt; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-size: 10pt; text-align: left"> </td> <td style="border-bottom: Black 1pt solid; font-size: 10pt; text-align: right"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">9,417</div></td> <td style="border-bottom: Black 1pt solid; font-size: 10pt; text-align: left"> </td> <td style="font-size: 10pt; padding-bottom: 1pt"> </td> <td style="border-bottom: Black 1pt solid; font-size: 10pt; text-align: left"> </td> <td style="border-bottom: Black 1pt solid; font-size: 10pt; text-align: right"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">1,844</div></td> <td style="border-bottom: Black 1pt solid; font-size: 10pt; text-align: left"> </td> </tr> <tr style="vertical-align: bottom; background-color: White"> <td style="font-size: 10pt"> </td> <td style="font-size: 10pt"> </td> <td style="font-size: 10pt; text-align: left"> </td> <td style="font-size: 10pt; text-align: right"> </td> <td style="font-size: 10pt; text-align: left"> </td> <td style="font-size: 10pt"> </td> <td style="font-size: 10pt; text-align: left"> </td> <td style="font-size: 10pt; text-align: right"> </td> <td style="font-size: 10pt; text-align: left"> </td> </tr> <tr style="vertical-align: bottom; background-color: rgb(204,238,255)"> <td style="font-size: 10pt">Total</td> <td style="font-size: 10pt"> </td> <td style="font-size: 10pt; text-align: left; border-bottom: Black 1pt solid">$</td> <td style="font-size: 10pt; text-align: right; border-bottom: Black 1pt solid"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">10,445</div></td> <td style="font-size: 10pt; text-align: left; border-bottom: Black 1pt solid"> </td> <td style="font-size: 10pt"> </td> <td style="font-size: 10pt; text-align: left; border-bottom: Black 1pt solid">$</td> <td style="font-size: 10pt; text-align: right; border-bottom: Black 1pt solid"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">3,112</div></td> <td style="font-size: 10pt; text-align: left; border-bottom: Black 1pt solid"> </td> </tr> </table></div>

Unrealized Gain (Loss) on Investments [Table Text Block]

	Years Ended December 31
	2018		2017		2016
Balance at beginning of year	$	-	$	-	$	-
Other comprehensive income before reclassification adjustment		-		-		523
Reclassification adjustment		-		-		(523	)
Balance at end of year	$	-	$	-	$	-