Note 4 - Goodwill and Intangible Assets (Detail) - Intangible Assets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Net Carrying Amount	$ 1,684	$ 432
Net Carrying Amount	2,194	942
Trademarks [Member] | Gross Carrying Amounts [Member]
Gross Carrying Amount	510	510
Net Carrying Amount	510	510
Trademarks [Member] | Net Carrying Amount [Member]
Gross Carrying Amount	510	510
Net Carrying Amount	510	510
Gross Carrying Amounts [Member] | Customer Relationships [Member]
Gross Carrying Amount	1,480	370
Gross Carrying Amounts [Member] | Patented Technology [Member]
Gross Carrying Amount	590	230
Gross Carrying Amounts [Member] | Computer Software, Intangible Asset [Member]
Gross Carrying Amount	270	270
Gross Carrying Amounts [Member] | Trade Names [Member]
Gross Carrying Amount	140
Gross Carrying Amounts [Member] | Customer Backlog [Member]
Gross Carrying Amount	70
Gross Carrying Amounts [Member] | Noncompete Agreements [Member]
Gross Carrying Amount	48
Gross Carrying Amounts [Member]
Gross Carrying Amount	2,598	870
Gross Carrying Amount	3,108	1,380
Accumulated Amortization [Member] | Customer Relationships [Member]
Accumulated Amortization	439	200
Accumulated Amortization [Member] | Patented Technology [Member]
Accumulated Amortization	233	150
Accumulated Amortization [Member] | Computer Software, Intangible Asset [Member]
Accumulated Amortization	115	88
Accumulated Amortization [Member] | Trade Names [Member]
Accumulated Amortization	33
Accumulated Amortization [Member] | Customer Backlog [Member]
Accumulated Amortization	70
Accumulated Amortization [Member] | Noncompete Agreements [Member]
Accumulated Amortization	24
Accumulated Amortization [Member]
Accumulated Amortization	914	438
Net Carrying Amount [Member] | Customer Relationships [Member]
Net Carrying Amount	1,041	170
Net Carrying Amount [Member] | Patented Technology [Member]
Net Carrying Amount	357	80
Net Carrying Amount [Member] | Computer Software, Intangible Asset [Member]
Net Carrying Amount	155	182
Net Carrying Amount [Member] | Trade Names [Member]
Net Carrying Amount	107
Net Carrying Amount [Member] | Noncompete Agreements [Member]
Net Carrying Amount	24
Net Carrying Amount [Member]
Net Carrying Amount	1,684	432
Net Carrying Amount	$ 2,194	$ 942