Note 4 - Goodwill and Intangible Assets (Detail) - Intangible Assets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Net Carrying Amount	$ 1,790	$ 432
Total intangible assets	2,300	942
Total intangible assets	2,300	942
Total intangible assets	2,300	942
Gross Carrying Amounts [Member] | Trademarks [Member]
Gross Carrying Amount	510	510
Total intangible assets	3,108
Net Carrying Amount	510	510
Total intangible assets	3,108
Total intangible assets	3,108
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
Total intangible assets		1,380
Total intangible assets		1,380
Total intangible assets		1,380
Accumulated Amortization [Member] | Trademarks [Member]
Accumulated Amortization	808
Total intangible assets	808
Total intangible assets	808
Total intangible assets	808
Accumulated Amortization [Member] | Customer Relationships [Member]
Accumulated Amortization	377	200
Total intangible assets	377	200
Total intangible assets	377	200
Total intangible assets	377	200
Accumulated Amortization [Member] | Patented Technology [Member]
Accumulated Amortization	212	150
Total intangible assets	212	150
Total intangible assets	212	150
Total intangible assets	212	150
Accumulated Amortization [Member] | Computer Software, Intangible Asset [Member]
Accumulated Amortization	108	88
Total intangible assets	108	88
Total intangible assets	108	88
Total intangible assets	108	88
Accumulated Amortization [Member] | Trade Names [Member]
Accumulated Amortization	25
Total intangible assets	25
Total intangible assets	25
Total intangible assets	25
Accumulated Amortization [Member] | Customer Backlog [Member]
Accumulated Amortization	70
Total intangible assets	70
Total intangible assets	70
Total intangible assets	70
Accumulated Amortization [Member] | Noncompete Agreements [Member]
Accumulated Amortization	16
Total intangible assets	16
Total intangible assets	16
Total intangible assets	16
Accumulated Amortization [Member]
Accumulated Amortization	808	438
Total intangible assets	808	438
Total intangible assets	808	438
Total intangible assets	808	438
Net Carrying Amount [Member] | Trademarks [Member]
Gross Carrying Amount	510	510
Total intangible assets	2,300
Net Carrying Amount	510	510
Total intangible assets	2,300
Total intangible assets	2,300
Net Carrying Amount [Member] | Customer Relationships [Member]
Net Carrying Amount	1,103	170
Net Carrying Amount [Member] | Patented Technology [Member]
Net Carrying Amount	378	80
Net Carrying Amount [Member] | Computer Software, Intangible Asset [Member]
Net Carrying Amount	162	182
Net Carrying Amount [Member] | Trade Names [Member]
Net Carrying Amount	115
Net Carrying Amount [Member] | Noncompete Agreements [Member]
Net Carrying Amount	32
Net Carrying Amount [Member]
Net Carrying Amount	1,790	432
Total intangible assets		942
Total intangible assets		942
Total intangible assets		$ 942