Note 8 - Goodwill and other intangible assets (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Gross Carrying Amount	$ 10,199,379	$ 10,199,379
Accumulated Amortization	(6,913,679)	(6,913,679)
Impairment charge	(1,691,396)	(1,691,396)
Net Carrying Amount	1,142,518	1,594,306
Customer relationships
Goodwill [Line Items]
Gross Carrying Amount	3,615,217	3,615,217
Accumulated Amortization	(2,507,782)	(2,430,214)
Impairment charge	(1,001,645)	(1,001,645)
Net Carrying Amount	105,790	183,360
Weighted average remaining amortization period	0 years	1 month 25 days
Knowhow and processes
Goodwill [Line Items]
Gross Carrying Amount	2,924,790	2,924,790
Accumulated Amortization	(2,237,525)	(2,237,525)
Impairment charge	(687,265)	(687,265)
Net Carrying Amount
Weighted average remaining amortization period	0 years	0 years
IP Rights Agreement
Goodwill [Line Items]
Gross Carrying Amount	1,300,000	1,300,000
Accumulated Amortization	(389,996)	(260,000)
Impairment charge
Net Carrying Amount	910,004	1,040,000
Weighted average remaining amortization period	4 years 10 months 10 days	5 years 7 months 17 days
Customer backlog
Goodwill [Line Items]
Gross Carrying Amount	1,801,055	1,801,055
Accumulated Amortization	(1,725,970)	(1,519,618)
Impairment charge
Net Carrying Amount	75,085	281,437
Weighted average remaining amortization period	4 days	1 year 6 months 15 days
Customer lists
Goodwill [Line Items]
Gross Carrying Amount	279,717	279,717
Accumulated Amortization	(277,231)	(277,231)
Impairment charge	(2,486)	(2,486)
Net Carrying Amount
Weighted average remaining amortization period	0 years	0 years
Employment contract
Goodwill [Line Items]
Gross Carrying Amount	165,000	165,000
Accumulated Amortization	(165,000)	(165,000)
Impairment charge
Net Carrying Amount
Weighted average remaining amortization period	0 years	0 years
Customer contracts
Goodwill [Line Items]
Gross Carrying Amount	113,600	113,600
Accumulated Amortization	(61,963)	(24,091)
Impairment charge
Net Carrying Amount	$ 51,637	$ 89,509
Weighted average remaining amortization period	0 years	2 years 6 months 15 days