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Stock-based compensation (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Stock-based compensation expenses included in the statement of operations	$ 249,704	$ 597,668
Cost of revenues
Stock-based compensation expenses included in the statement of operations	26,196	50,660
Research and development
Stock-based compensation expenses included in the statement of operations	72,104	136,618
Sales and marketing
Stock-based compensation expenses included in the statement of operations	43,970	128,759
General and administrative
Stock-based compensation expenses included in the statement of operations	$ 107,434	$ 281,631

X

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration