Note 2 - Prepaid Expenses and Other Current Assets (Details) - Prepaid Expenses and Other Current Assets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Note 2 - Prepaid Expenses and Other Current Assets (Details) - Prepaid Expenses and Other Current Assets [Line Items]
Prepaid inventory	$ 415
Prepaid insurance	75	95
Prepaid maintenance contracts	59	58
Prepaid rent	38	61
Prepaid other	73	67
Total prepaid expenses and other current assets	1,041	350
Foreign Tax Authority [Member] | Research Tax Credit Carryforward [Member]
Note 2 - Prepaid Expenses and Other Current Assets (Details) - Prepaid Expenses and Other Current Assets [Line Items]
Foreign research and development tax credit	$ 381	$ 69