Note 8 - Severance and Separation Expenses (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	Jan. 31, 2012	Jun. 30, 2012	Jan. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Restructuring and Related Activities, Description				We are subject to indemnification, confidentiality, and three-year non-competition and non-solicitation provisions in connection with the July 2011 Destron Transaction. The terms of the Destron Transaction also required Joseph J. Grillo, our former chief executive officer, to enter into a three-year non-competition agreement with Allflex. Under the terms of Mr. Grillo's then existing employment agreement with us, if a change of control occurred and Mr. Grillo resigned within six months of the change of control and provided us a four-month notice of such resignation, Mr. Grillo was entitled to a change of control payment equal to one and a half times both his base salary and bonus, or approximately $1.0 million. The Destron Transaction represented a change of control as defined in the agreement. In addition, due to Allflex's requirement that Mr. Grillo sign a three year non-competition agreement, we agreed to amend Mr. Grillo's employment agreement to include an additional payment of one year base salary, or $338 thousand, and make other changes to the terms of payment. The additional one year base salary is payable on the earlier of the second anniversary of the closing date of the Destron Transaction or our winding down if, and only if, Mr. Grillo has not found employment by that time. In addition, if Mr. Grillo secures alternative employment during the third year after the closing of the Destron Transaction, he will be obligated to repay the amount earned during the third year up to the amount he received from us.
Restricted Cash and Cash Equivalents, Current		$ 972		$ 972
Accrued Severance, Noncurrent		338		338
Restructuring Reserve		1,350		1,350	1,444
Severance Costs Amortization Term	1 month		4 months
Severance Costs		96		442
Mr Grillo Employment Agreement [Member]
Severance Costs				$ 300