Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net loss	$ (795,618)	$ (384,532)
Adjustment for non-cash items:
Depreciation and amortization	262,238	290,300
Stock-based compensation	0	2,107
Deferred income taxes and other	(329,441)	(137,621)
Change in operating assets and liabilities:
Accounts receivable	188,808	67,300
Inventories	(324,306)	(411,417)
Prepaid expenses and other current assets	(40,247)	(56,962)
Other assets	104,268	(56,092)
Accounts payable and accrued liabilities	(207,666)	1,027,201
Deferred revenue	305,200	(1,203,766)
Net cash used in operating activities	(836,764)	(863,482)
Cash flows from investing activities:
Purchase of property and equipment	(37,649)	(636,170)
Net cash used in investing activities	(37,649)	(636,170)
Cash flows from financing activities:
Payments of long-term obligations	(112,433)	(104,186)
Net cash used in financing activities	(112,433)	(104,186)
Effect of exchange rate changes on cash flows	(19,456)	(28,675)
Net decrease in cash and cash equivalents	(1,006,302)	(1,632,513)
Cash and cash equivalents, beginning of period	1,921,349	3,745,684
Cash and cash equivalents, end of period	$ 915,047	$ 2,113,171