Note 3 - Marketable Securities

12 Months Ended

Mar. 31, 2016

Notes to Financial Statements

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

3. MARKETABLE SECURITIES

Marketable securities at

March 31, 2016

consisted of investments in publicly traded companies with a fair value of

$9,656,000,

an aggregate cost basis of

$9,791,000,

gross unrealized gains aggregating

$422,000

and gross unrealized losses aggregating

$557,000.

Marketable securities at

March 31, 2015

consisted of investments with a fair market value of

$5,279,000,

an aggregate cost basis of

$5,490,000,

gross unrealized gains aggregating

$0

and gross unrealized losses aggregating

$211,000.

Securities that had been in a continuous unrealized loss position for less than

12

months as of

March 31, 2016

had an aggregate fair value and unrealized loss of

$5,903,000

and

$163,000,

respectively (

$4,168,000

and

$176,000,

respectively, at

March 31, 2015).

Securities that had been in a continuous unrealized loss position for more than

12

months as of

March 31, 2016

had an aggregate fair value and unrealized loss of

$4,711,000

and

$395,000,

respectively (

$1,111,000

and

$35,000,

respectively, at

March 31, 2015).

The Company realized gains of

$50,000

and

$9,000

from the sale of securities during the years ended

March 31, 2016

and

March 31, 2015,

respectively.