Income Taxes (Details) (USD $)	Nov. 30, 2014	Feb. 28, 2014
Current
Allowance for doubtful accounts	$ 1,000	$ 1,000
Inventory allowance	934,000us-gaap_DeferredTaxAssetsInventory	930,000us-gaap_DeferredTaxAssetsInventory
Section 263A capitalized costs	246,000us-gaap_DeferredTaxAssetsOther	246,000us-gaap_DeferredTaxAssetsOther
Total current deferred tax assets	1,181,000us-gaap_DeferredTaxAssetsGross	1,177,000us-gaap_DeferredTaxAssetsGross
Valuation allowance	(1,181,000)	(1,177,000)
Total net deferred taxes	0us-gaap_DeferredTaxAssetsLiabilitiesNet	0us-gaap_DeferredTaxAssetsLiabilitiesNet
Long-term
Loss carryforwards	4,572,000	5,309,000
Depreciation	(32,000)sodi_DeferredTaxAssetsDepreciation	(46,000)sodi_DeferredTaxAssetsDepreciation
Total long-term deferred tax assets	4,540,000	5,263,000
Valuation allowance	(4,540,000)	(5,263,000)
Total net deferred tax assets	$ 0us-gaap_DeferredTaxAssetsNetNoncurrent	$ 0us-gaap_DeferredTaxAssetsNetNoncurrent

Deferred tax assets depreciation.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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