Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows from Operating Activities:
Net Loss	$ (999)	$ (843)
Adjustments to reconcile the net loss to cash flows from operating activities:
Depreciation	959	876
Amortization of deferred grant and other income	(246)	(235)
Deferred grant and other income	316	288
Deferred income taxes	(536)	(447)
Share-based compensation	76	98
Increase (decrease) in cash from:
Accounts receivable	793	278
Materials and supplies	(31)	10
Prepaid expenses and other current assets	318	340
Accounts payable and accrued expenses	(305)	444
Net cash flows provided by operating activities	345	809
Cash Flows from Investing Activities:
Purchase of property and equipment	(822)	(350)
Net cash flows used in investing activities	(822)	(350)
Cash Flows from Financing Activities:
Dividends paid	(200)	(198)
Issuance of common shares for stock options exercised and employee stock purchases	15	12
Net cash flows used in financing activities	(185)	(186)
(Decrease) Increase in Cash and Cash Equivalents	(662)	273
Cash and Cash Equivalents, Beginning of Period	6,281	6,414
Cash and Cash Equivalents, End of Period	5,619	6,687
Supplemental Disclosures:
Cash paid for income taxes	310	385
Deferred grant income in accounts receivable	17
Property and equipment included in accounts payable	$ 265	$ 217