Note 2 - Significant Accounting Policies (Details) - Concentration of Credit Risk (Customer Concentration Risk [Member])	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Alcatel [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	7.30%	8.40%	5.30%	7.50%
Alcatel [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	22.40%	16.20%	22.40%	16.20%
Centric [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	4.20%	4.00%	6.00%	3.20%
Centric [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	10.70%	3.50%	10.70%	3.50%
Elosoft [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	5.70%	10.40%	6.40%	6.30%
Elosoft [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	12.70%	15.10%	12.70%	15.10%
GE [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	17.80%	9.70%	14.50%	6.80%
GE [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	4.10%	16.50%	4.10%	16.50%
IDS LLC [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	9.30%	9.90%	7.00%	6.60%
IDS LLC [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	0.00%	4.50%	0.00%	4.50%
Seagate Technology [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	7.40%	1.40%
Seagate Technology [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	2.20%	2.30%
Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	51.70%	43.80%	39.20%	30.40%
Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	52.10%	58.10%	49.90%	55.80%